Re: [MBZ] 300D 2.5 Glow Plug Relay
On 14/05/2023 10:17 AM, Dimitri Seretakis via Mercedes wrote: It’s a brand new relay. I bought it at the stealership! Maybe it’s a ground issue? Where is this thing grounded? You should be able to test the relay without it being in the car. Energizing it should result in power being transferred to the pin that you need it to be transferred to in order to make the glow plugs hot. A relay is just a switch. Randy ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Ok so one is indeed the ground. How do I check to see if ground is working. Kaleb said to jumper it to another known ground but how do I do that when the connector connects everything together? Jumper every contact in the connector with every corresponding pin on the relay? That is technically challenging to do. Sent from my iPhone > On May 14, 2023, at 1:36 PM, Jim Cathey wrote: > > >> >> Could one be a ground? > > One would have to be. Electronics, _all_ electronics, works in circuits. > As in: innie _and_ outie. There is no yin without yang, etc. > > Check them all, make no assumptions. > > Generally, in these cars, there are a few major ground points where all > the brown wires come together. If one of those points starts to go bad, > all hell breaks loose. > > -- Jim > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Thank you Fred. This is very helpful. I tested all the glow plugs at the glow relay connector and they all check out. I’m not sure how to test the system leaving one or another pin disconnected since the connector connects them all together. Would I have to rig jumpers between each connector hole and its corresponding pin? Sent from my iPhone > On May 14, 2023, at 12:24 PM, Frederick Moir via Mercedes > wrote: > > Dimitri. > FWIW found this. > I'm not familiar with that glow relay part number but I'll assume the > connectors are compatible with MB passenger car harnesses and it's an > afterglow relay. Forget the wire colors and check for pin numbers either on > the relay itself or on the connector. The numbers should correspond between > relay and connector pins. Here's the pin list for a 90-91 300D 2.5: > > pin 1 = +12V when key switch in run to initiate preglow cycle (W124 = hot > side of fuse 7) > pin 2 = +12V when key switch in start to terminate preglow cycle (W124 = > NSS) > pin 3 = +12V to gauge cluster glow indicator > pin 4 = ground > pin 5 = blank > pin 6 = signal from glow temp sensor by water pump to determine preglow and > afterglow cycle times > > Assuming each glow plugs test between 0.7- and 1 ohm at the glow relay > connector, leave pin 2 disconnected then see if you get the max preglow > cycle of ~30 seconds. I don't know how the glow relay behaves when there is > no temp sensor. > > If this gets to be too much work, a 617 pencil type glow relay should work > for you since afterglow isn't much of a benefit in the tropics if you have > healthy glow plugs. > >> On Sun, May 14, 2023 at 11:29 AM Kaleb Striplin via Mercedes < >> mercedes@okiebenz.com> wrote: >> >> It appears pin 31 is ground, connect a test wire from there direct to >> ground and see what happens. >> >> >> https://forums.mbclub.co.uk/threads/w124-continuous-voltage-to-glow-plugs-ignition-vacuum-connection.258241/ >> >> Sent from my iPhone >> >>> On May 14, 2023, at 10:18 AM, Dimitri Seretakis >> wrote: >>> >>> It’s a brand new relay. I bought it at the stealership! Maybe it’s a >> ground issue? Where is this thing grounded? >>> >>> Sent from my iPhone >>> On May 14, 2023, at 11:14 AM, Kaleb Striplin via Mercedes < >> mercedes@okiebenz.com> wrote: There is no ecm that controls anything with the glow plugs. If the >> relay gets power, but no power is coming out of the pins to the glow plug >> harness, then the relay is bad. Sent from my iPhone >> On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes < >> mercedes@okiebenz.com> wrote: > > So I’m thinking that maybe the ground to the relay is the problem or >> that there is an ecm issue. The relay gets power but doesn’t put out power >> to the glow plugs. But where is the relay grounded? The three connections >> are the power lug to the battery, the harness to the glow plugs and the >> harness going to the ignition. The harness going to the ignition has 5 >> wires. One gets power when ignition is turn to on position. I don’t know >> what the other 4 do. Could one be a ground? I assume some go to an ecm. >> Could a bad ecm be telling the gp relay not to send a signal to the plugs? >> I’m about ready to give up and send this car to a mechanic! > > Sent from my iPhone > >>> On May 14, 2023, at 12:34 AM, Dimitri Seretakis < >> dsereta...@yahoo.com> wrote: >> >> Yes my car has three connections as you describe. Big plug to glow >> plug, cable to battery and small plug. Small plug corresponds to 5 pins on >> relay. One connection on the plug is live only when ignition is turned on >> so I presume that is the ignition on. >> >> Sent from my iPhone >> On May 13, 2023, at 12:37 PM, Jim Cathey >> wrote: >>> >>> Used to be there were THREE connections to the relay: >>> A big plug that went to the glow plugs, a big cable that >>> went to the battery, and a small plug that was command >>> and control. The first two are Duh!, but they all need to >>> be working correctly, or you don't get a good start. >>> >>> IIRC there was an ignition-on signal, a start signal, and >>> a dash lamp signal. Ignition-on started the GP timer, >>> start-release stopped the glow plugs, and the light was >>> the light. >>> >>> Not sure exactly what your car has. Check the car schematic. >>> >>> -- Jim >>> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to:
Re: [MBZ] 300D 2.5 Glow Plug Relay
> Could one be a ground? One would have to be. Electronics, _all_ electronics, works in circuits. As in: innie _and_ outie. There is no yin without yang, etc. Check them all, make no assumptions. Generally, in these cars, there are a few major ground points where all the brown wires come together. If one of those points starts to go bad, all hell breaks loose. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Thank you. I will try that. Sent from my iPhone > On May 14, 2023, at 11:29 AM, Kaleb Striplin via Mercedes > wrote: > > It appears pin 31 is ground, connect a test wire from there direct to ground > and see what happens. > > https://forums.mbclub.co.uk/threads/w124-continuous-voltage-to-glow-plugs-ignition-vacuum-connection.258241/ > > Sent from my iPhone > >> On May 14, 2023, at 10:18 AM, Dimitri Seretakis wrote: >> >> It’s a brand new relay. I bought it at the stealership! Maybe it’s a ground >> issue? Where is this thing grounded? >> >> Sent from my iPhone >> On May 14, 2023, at 11:14 AM, Kaleb Striplin via Mercedes wrote: >>> >>> There is no ecm that controls anything with the glow plugs. If the relay >>> gets power, but no power is coming out of the pins to the glow plug >>> harness, then the relay is bad. >>> >>> Sent from my iPhone >>> > On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes > wrote: So I’m thinking that maybe the ground to the relay is the problem or that there is an ecm issue. The relay gets power but doesn’t put out power to the glow plugs. But where is the relay grounded? The three connections are the power lug to the battery, the harness to the glow plugs and the harness going to the ignition. The harness going to the ignition has 5 wires. One gets power when ignition is turn to on position. I don’t know what the other 4 do. Could one be a ground? I assume some go to an ecm. Could a bad ecm be telling the gp relay not to send a signal to the plugs? I’m about ready to give up and send this car to a mechanic! Sent from my iPhone >> On May 14, 2023, at 12:34 AM, Dimitri Seretakis >> wrote: > > Yes my car has three connections as you describe. Big plug to glow plug, > cable to battery and small plug. Small plug corresponds to 5 pins on > relay. One connection on the plug is live only when ignition is turned on > so I presume that is the ignition on. > > Sent from my iPhone > >>> On May 13, 2023, at 12:37 PM, Jim Cathey >>> wrote: >> >> Used to be there were THREE connections to the relay: >> A big plug that went to the glow plugs, a big cable that >> went to the battery, and a small plug that was command >> and control. The first two are Duh!, but they all need to >> be working correctly, or you don't get a good start. >> >> IIRC there was an ignition-on signal, a start signal, and >> a dash lamp signal. Ignition-on started the GP timer, >> start-release stopped the glow plugs, and the light was >> the light. >> >> Not sure exactly what your car has. Check the car schematic. >> >> -- Jim >> ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Dimitri. FWIW found this. I'm not familiar with that glow relay part number but I'll assume the connectors are compatible with MB passenger car harnesses and it's an afterglow relay. Forget the wire colors and check for pin numbers either on the relay itself or on the connector. The numbers should correspond between relay and connector pins. Here's the pin list for a 90-91 300D 2.5: pin 1 = +12V when key switch in run to initiate preglow cycle (W124 = hot side of fuse 7) pin 2 = +12V when key switch in start to terminate preglow cycle (W124 = NSS) pin 3 = +12V to gauge cluster glow indicator pin 4 = ground pin 5 = blank pin 6 = signal from glow temp sensor by water pump to determine preglow and afterglow cycle times Assuming each glow plugs test between 0.7- and 1 ohm at the glow relay connector, leave pin 2 disconnected then see if you get the max preglow cycle of ~30 seconds. I don't know how the glow relay behaves when there is no temp sensor. If this gets to be too much work, a 617 pencil type glow relay should work for you since afterglow isn't much of a benefit in the tropics if you have healthy glow plugs. On Sun, May 14, 2023 at 11:29 AM Kaleb Striplin via Mercedes < mercedes@okiebenz.com> wrote: > It appears pin 31 is ground, connect a test wire from there direct to > ground and see what happens. > > > https://forums.mbclub.co.uk/threads/w124-continuous-voltage-to-glow-plugs-ignition-vacuum-connection.258241/ > > Sent from my iPhone > > > On May 14, 2023, at 10:18 AM, Dimitri Seretakis > wrote: > > > > It’s a brand new relay. I bought it at the stealership! Maybe it’s a > ground issue? Where is this thing grounded? > > > > Sent from my iPhone > > > >> On May 14, 2023, at 11:14 AM, Kaleb Striplin via Mercedes < > mercedes@okiebenz.com> wrote: > >> > >> There is no ecm that controls anything with the glow plugs. If the > relay gets power, but no power is coming out of the pins to the glow plug > harness, then the relay is bad. > >> > >> Sent from my iPhone > >> > On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes < > mercedes@okiebenz.com> wrote: > >>> > >>> So I’m thinking that maybe the ground to the relay is the problem or > that there is an ecm issue. The relay gets power but doesn’t put out power > to the glow plugs. But where is the relay grounded? The three connections > are the power lug to the battery, the harness to the glow plugs and the > harness going to the ignition. The harness going to the ignition has 5 > wires. One gets power when ignition is turn to on position. I don’t know > what the other 4 do. Could one be a ground? I assume some go to an ecm. > Could a bad ecm be telling the gp relay not to send a signal to the plugs? > I’m about ready to give up and send this car to a mechanic! > >>> > >>> Sent from my iPhone > >>> > > On May 14, 2023, at 12:34 AM, Dimitri Seretakis < > dsereta...@yahoo.com> wrote: > > Yes my car has three connections as you describe. Big plug to glow > plug, cable to battery and small plug. Small plug corresponds to 5 pins on > relay. One connection on the plug is live only when ignition is turned on > so I presume that is the ignition on. > > Sent from my iPhone > > >> On May 13, 2023, at 12:37 PM, Jim Cathey > wrote: > > > > Used to be there were THREE connections to the relay: > > A big plug that went to the glow plugs, a big cable that > > went to the battery, and a small plug that was command > > and control. The first two are Duh!, but they all need to > > be working correctly, or you don't get a good start. > > > > IIRC there was an ignition-on signal, a start signal, and > > a dash lamp signal. Ignition-on started the GP timer, > > start-release stopped the glow plugs, and the light was > > the light. > > > > Not sure exactly what your car has. Check the car schematic. > > > > -- Jim > > > >>> > >>> > >>> ___ > >>> http://www.okiebenz.com > >>> > >>> To search list archives http://www.okiebenz.com/archive/ > >>> > >>> To Unsubscribe or change delivery options go to: > >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>> > >> > >> > >> ___ > >> http://www.okiebenz.com > >> > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > -- Fred Moir Lynn MA Diesel preferred ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to:
Re: [MBZ] 300D 2.5 Glow Plug Relay
It appears pin 31 is ground, connect a test wire from there direct to ground and see what happens. https://forums.mbclub.co.uk/threads/w124-continuous-voltage-to-glow-plugs-ignition-vacuum-connection.258241/ Sent from my iPhone > On May 14, 2023, at 10:18 AM, Dimitri Seretakis wrote: > > It’s a brand new relay. I bought it at the stealership! Maybe it’s a ground > issue? Where is this thing grounded? > > Sent from my iPhone > >> On May 14, 2023, at 11:14 AM, Kaleb Striplin via Mercedes >> wrote: >> >> There is no ecm that controls anything with the glow plugs. If the relay >> gets power, but no power is coming out of the pins to the glow plug harness, >> then the relay is bad. >> >> Sent from my iPhone >> On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes wrote: >>> >>> So I’m thinking that maybe the ground to the relay is the problem or that >>> there is an ecm issue. The relay gets power but doesn’t put out power to >>> the glow plugs. But where is the relay grounded? The three connections are >>> the power lug to the battery, the harness to the glow plugs and the harness >>> going to the ignition. The harness going to the ignition has 5 wires. One >>> gets power when ignition is turn to on position. I don’t know what the >>> other 4 do. Could one be a ground? I assume some go to an ecm. Could a bad >>> ecm be telling the gp relay not to send a signal to the plugs? I’m about >>> ready to give up and send this car to a mechanic! >>> >>> Sent from my iPhone >>> > On May 14, 2023, at 12:34 AM, Dimitri Seretakis > wrote: Yes my car has three connections as you describe. Big plug to glow plug, cable to battery and small plug. Small plug corresponds to 5 pins on relay. One connection on the plug is live only when ignition is turned on so I presume that is the ignition on. Sent from my iPhone >> On May 13, 2023, at 12:37 PM, Jim Cathey wrote: > > Used to be there were THREE connections to the relay: > A big plug that went to the glow plugs, a big cable that > went to the battery, and a small plug that was command > and control. The first two are Duh!, but they all need to > be working correctly, or you don't get a good start. > > IIRC there was an ignition-on signal, a start signal, and > a dash lamp signal. Ignition-on started the GP timer, > start-release stopped the glow plugs, and the light was > the light. > > Not sure exactly what your car has. Check the car schematic. > > -- Jim > >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
It’s a brand new relay. I bought it at the stealership! Maybe it’s a ground issue? Where is this thing grounded? Sent from my iPhone > On May 14, 2023, at 11:14 AM, Kaleb Striplin via Mercedes > wrote: > > There is no ecm that controls anything with the glow plugs. If the relay > gets power, but no power is coming out of the pins to the glow plug harness, > then the relay is bad. > > Sent from my iPhone > >> On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes >> wrote: >> >> So I’m thinking that maybe the ground to the relay is the problem or that >> there is an ecm issue. The relay gets power but doesn’t put out power to the >> glow plugs. But where is the relay grounded? The three connections are the >> power lug to the battery, the harness to the glow plugs and the harness >> going to the ignition. The harness going to the ignition has 5 wires. One >> gets power when ignition is turn to on position. I don’t know what the other >> 4 do. Could one be a ground? I assume some go to an ecm. Could a bad ecm be >> telling the gp relay not to send a signal to the plugs? I’m about ready to >> give up and send this car to a mechanic! >> >> Sent from my iPhone >> On May 14, 2023, at 12:34 AM, Dimitri Seretakis wrote: >>> >>> Yes my car has three connections as you describe. Big plug to glow plug, >>> cable to battery and small plug. Small plug corresponds to 5 pins on relay. >>> One connection on the plug is live only when ignition is turned on so I >>> presume that is the ignition on. >>> >>> Sent from my iPhone >>> > On May 13, 2023, at 12:37 PM, Jim Cathey wrote: Used to be there were THREE connections to the relay: A big plug that went to the glow plugs, a big cable that went to the battery, and a small plug that was command and control. The first two are Duh!, but they all need to be working correctly, or you don't get a good start. IIRC there was an ignition-on signal, a start signal, and a dash lamp signal. Ignition-on started the GP timer, start-release stopped the glow plugs, and the light was the light. Not sure exactly what your car has. Check the car schematic. -- Jim >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
There is no ecm that controls anything with the glow plugs. If the relay gets power, but no power is coming out of the pins to the glow plug harness, then the relay is bad. Sent from my iPhone > On May 14, 2023, at 9:02 AM, Dimitri Seretakis via Mercedes > wrote: > > So I’m thinking that maybe the ground to the relay is the problem or that > there is an ecm issue. The relay gets power but doesn’t put out power to the > glow plugs. But where is the relay grounded? The three connections are the > power lug to the battery, the harness to the glow plugs and the harness going > to the ignition. The harness going to the ignition has 5 wires. One gets > power when ignition is turn to on position. I don’t know what the other 4 do. > Could one be a ground? I assume some go to an ecm. Could a bad ecm be telling > the gp relay not to send a signal to the plugs? I’m about ready to give up > and send this car to a mechanic! > > Sent from my iPhone > >> On May 14, 2023, at 12:34 AM, Dimitri Seretakis wrote: >> >> Yes my car has three connections as you describe. Big plug to glow plug, >> cable to battery and small plug. Small plug corresponds to 5 pins on relay. >> One connection on the plug is live only when ignition is turned on so I >> presume that is the ignition on. >> >> Sent from my iPhone >> On May 13, 2023, at 12:37 PM, Jim Cathey wrote: >>> >>> Used to be there were THREE connections to the relay: >>> A big plug that went to the glow plugs, a big cable that >>> went to the battery, and a small plug that was command >>> and control. The first two are Duh!, but they all need to >>> be working correctly, or you don't get a good start. >>> >>> IIRC there was an ignition-on signal, a start signal, and >>> a dash lamp signal. Ignition-on started the GP timer, >>> start-release stopped the glow plugs, and the light was >>> the light. >>> >>> Not sure exactly what your car has. Check the car schematic. >>> >>> -- Jim >>> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
So I’m thinking that maybe the ground to the relay is the problem or that there is an ecm issue. The relay gets power but doesn’t put out power to the glow plugs. But where is the relay grounded? The three connections are the power lug to the battery, the harness to the glow plugs and the harness going to the ignition. The harness going to the ignition has 5 wires. One gets power when ignition is turn to on position. I don’t know what the other 4 do. Could one be a ground? I assume some go to an ecm. Could a bad ecm be telling the gp relay not to send a signal to the plugs? I’m about ready to give up and send this car to a mechanic! Sent from my iPhone > On May 14, 2023, at 12:34 AM, Dimitri Seretakis wrote: > > Yes my car has three connections as you describe. Big plug to glow plug, > cable to battery and small plug. Small plug corresponds to 5 pins on relay. > One connection on the plug is live only when ignition is turned on so I > presume that is the ignition on. > > Sent from my iPhone > >> On May 13, 2023, at 12:37 PM, Jim Cathey wrote: >> >> Used to be there were THREE connections to the relay: >> A big plug that went to the glow plugs, a big cable that >> went to the battery, and a small plug that was command >> and control. The first two are Duh!, but they all need to >> be working correctly, or you don't get a good start. >> >> IIRC there was an ignition-on signal, a start signal, and >> a dash lamp signal. Ignition-on started the GP timer, >> start-release stopped the glow plugs, and the light was >> the light. >> >> Not sure exactly what your car has. Check the car schematic. >> >> -- Jim >> ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Yes my car has three connections as you describe. Big plug to glow plug, cable to battery and small plug. Small plug corresponds to 5 pins on relay. One connection on the plug is live only when ignition is turned on so I presume that is the ignition on. Sent from my iPhone > On May 13, 2023, at 12:37 PM, Jim Cathey wrote: > > Used to be there were THREE connections to the relay: > A big plug that went to the glow plugs, a big cable that > went to the battery, and a small plug that was command > and control. The first two are Duh!, but they all need to > be working correctly, or you don't get a good start. > > IIRC there was an ignition-on signal, a start signal, and > a dash lamp signal. Ignition-on started the GP timer, > start-release stopped the glow plugs, and the light was > the light. > > Not sure exactly what your car has. Check the car schematic. > > -- Jim > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
On Sat, May 13, 2023, at 11:37, Jim Cathey via Mercedes wrote: > start-release stopped the glow plugs On my W116, if I know the engine is warm enough (e.g. after fueling or other short stop) I won't wait for a full glow cycle. Ususally the glow light goes out when I start the car, but occasionally it doesn't and it stays lit until the cycle times out. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Ahh so the “activator” might not be working even if power is going through the system. That would be the main thing to check then --FT Sent from iFōn > On May 13, 2023, at 12:38 PM, Jim Cathey via Mercedes > wrote: > > Used to be there were THREE connections to the relay: > A big plug that went to the glow plugs, a big cable that > went to the battery, and a small plug that was command > and control. The first two are Duh!, but they all need to > be working correctly, or you don't get a good start. > > IIRC there was an ignition-on signal, a start signal, and > a dash lamp signal. Ignition-on started the GP timer, > start-release stopped the glow plugs, and the light was > the light. > > Not sure exactly what your car has. Check the car schematic. > > -- Jim > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Used to be there were THREE connections to the relay: A big plug that went to the glow plugs, a big cable that went to the battery, and a small plug that was command and control. The first two are Duh!, but they all need to be working correctly, or you don't get a good start. IIRC there was an ignition-on signal, a start signal, and a dash lamp signal. Ignition-on started the GP timer, start-release stopped the glow plugs, and the light was the light. Not sure exactly what your car has. Check the car schematic. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Get a wire and connect one end to the power coming into the relay then stick the other end on each pin in succession and see if you get power/heat to that particular plug. If the plugs get power you’ll know the problem is with the relay. If the plugs don’t heat up then there is some other issue. —FT Sent from my iPad > On May 13, 2023, at 8:57 AM, Dimitri Seretakis wrote: > > How do I jumper around the relay? Battery positive terminal to what? The > harness has 5 pins. > > Sent from my iPhone > >> On May 13, 2023, at 8:42 AM, Buggered Benzmail via Mercedes >> wrote: >> >> So if you jumper around the relay do you get glows to the plugs? >> >> —FT >> >> Sent from my iPad >> On May 13, 2023, at 8:36 AM, Dimitri Seretakis wrote: >>> >>> I don’t hear the relay click but I don’t think it’s a mechanical relay. >>> Having no glow and then replacing the relay with factory new one and still >>> no glow makes me doubt that the new relay is bad though. >>> >>> Sent from my iPhone >>> > On May 12, 2023, at 9:31 PM, Buggered Benzmail via Mercedes > wrote: Can you hear or feel the relay click when the ignition switch is turned on? It sounds from all the symptoms like the mechanical relay is bad. Or maybe be there isn’t enough current to actually activate the relay? You could still see volts but not current. Did you try running power directly to the relay off the battery, bypass the ignition switch? --FT Sent from iFōn >> On May 12, 2023, at 8:04 PM, Dimitri Seretakis via Mercedes >> wrote: > > Ok so in addition to the wire that goes to the relay power lug, there is > a second harness going to the relay which is comprised of 5 wires going > into a connector. One of these is purple with white stripe. One of these > 5 wires, not sure which without taking connector apart, is live only when > ignition is in on position. I’m guessing, therefore, that there is > signal from key switch? So I’m guessing that if there is power to the > relay and there is signal from the key switch but there is no power > output from the relay at the five pins that go to the corresponding glow > plugs that the relay is bad. But this is a new relay. I realize that a > new relay could also be defective but I just don’t buy it. What could be > going on here? > > Sent from my iPhone > >>> On May 12, 2023, at 5:47 PM, Dimitri Seretakis >>> wrote: >> I’m not sure how to check for that. There is constant power at the lug >> on the relay. With the ignition in the on position there is no power at >> any of the 5 pins on the relay that go to their respective glow plugs. >> I inspected the chaffed harness and while there are some exposed wires >> where the insulation has rubbed off, the wires appear to be intact and >> not obviously shorting on anything. >> I’m at a loss here. >> >> Sent from my iPhone >> On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes wrote: >>> >>> The signal from the keyswitch should be there at the relay. If it's >>> not, >>> of course it won't work. Used to be the purple wire, IIRC. >>> >>> -- Jim >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
How do I jumper around the relay? Battery positive terminal to what? The harness has 5 pins. Sent from my iPhone > On May 13, 2023, at 8:42 AM, Buggered Benzmail via Mercedes > wrote: > > So if you jumper around the relay do you get glows to the plugs? > > —FT > > Sent from my iPad > >> On May 13, 2023, at 8:36 AM, Dimitri Seretakis wrote: >> >> I don’t hear the relay click but I don’t think it’s a mechanical relay. >> Having no glow and then replacing the relay with factory new one and still >> no glow makes me doubt that the new relay is bad though. >> >> Sent from my iPhone >> On May 12, 2023, at 9:31 PM, Buggered Benzmail via Mercedes wrote: >>> >>> Can you hear or feel the relay click when the ignition switch is turned >>> on? It sounds from all the symptoms like the mechanical relay is bad. Or >>> maybe be there isn’t enough current to actually activate the relay? You >>> could still see volts but not current. Did you try running power directly >>> to the relay off the battery, bypass the ignition switch? >>> >>> --FT >>> Sent from iFōn >>> > On May 12, 2023, at 8:04 PM, Dimitri Seretakis via Mercedes > wrote: Ok so in addition to the wire that goes to the relay power lug, there is a second harness going to the relay which is comprised of 5 wires going into a connector. One of these is purple with white stripe. One of these 5 wires, not sure which without taking connector apart, is live only when ignition is in on position. I’m guessing, therefore, that there is signal from key switch? So I’m guessing that if there is power to the relay and there is signal from the key switch but there is no power output from the relay at the five pins that go to the corresponding glow plugs that the relay is bad. But this is a new relay. I realize that a new relay could also be defective but I just don’t buy it. What could be going on here? Sent from my iPhone >> On May 12, 2023, at 5:47 PM, Dimitri Seretakis >> wrote: > I’m not sure how to check for that. There is constant power at the lug > on the relay. With the ignition in the on position there is no power at > any of the 5 pins on the relay that go to their respective glow plugs. > I inspected the chaffed harness and while there are some exposed wires > where the insulation has rubbed off, the wires appear to be intact and > not obviously shorting on anything. > I’m at a loss here. > > Sent from my iPhone > >>> On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes >>> wrote: >> >> The signal from the keyswitch should be there at the relay. If it's >> not, >> of course it won't work. Used to be the purple wire, IIRC. >> >> -- Jim >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
So if you jumper around the relay do you get glows to the plugs? —FT Sent from my iPad > On May 13, 2023, at 8:36 AM, Dimitri Seretakis wrote: > > I don’t hear the relay click but I don’t think it’s a mechanical relay. > Having no glow and then replacing the relay with factory new one and still no > glow makes me doubt that the new relay is bad though. > > Sent from my iPhone > >> On May 12, 2023, at 9:31 PM, Buggered Benzmail via Mercedes >> wrote: >> >> Can you hear or feel the relay click when the ignition switch is turned on? >> It sounds from all the symptoms like the mechanical relay is bad. Or maybe >> be there isn’t enough current to actually activate the relay? You could >> still see volts but not current. Did you try running power directly to the >> relay off the battery, bypass the ignition switch? >> >> --FT >> Sent from iFōn >> On May 12, 2023, at 8:04 PM, Dimitri Seretakis via Mercedes wrote: >>> >>> Ok so in addition to the wire that goes to the relay power lug, there is a >>> second harness going to the relay which is comprised of 5 wires going into >>> a connector. One of these is purple with white stripe. One of these 5 >>> wires, not sure which without taking connector apart, is live only when >>> ignition is in on position. I’m guessing, therefore, that there is signal >>> from key switch? So I’m guessing that if there is power to the relay and >>> there is signal from the key switch but there is no power output from the >>> relay at the five pins that go to the corresponding glow plugs that the >>> relay is bad. But this is a new relay. I realize that a new relay could >>> also be defective but I just don’t buy it. What could be going on here? >>> >>> Sent from my iPhone >>> > On May 12, 2023, at 5:47 PM, Dimitri Seretakis > wrote: I’m not sure how to check for that. There is constant power at the lug on the relay. With the ignition in the on position there is no power at any of the 5 pins on the relay that go to their respective glow plugs. I inspected the chaffed harness and while there are some exposed wires where the insulation has rubbed off, the wires appear to be intact and not obviously shorting on anything. I’m at a loss here. Sent from my iPhone >> On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes >> wrote: > > The signal from the keyswitch should be there at the relay. If it's not, > of course it won't work. Used to be the purple wire, IIRC. > > -- Jim > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
I don’t hear the relay click but I don’t think it’s a mechanical relay. Having no glow and then replacing the relay with factory new one and still no glow makes me doubt that the new relay is bad though. Sent from my iPhone > On May 12, 2023, at 9:31 PM, Buggered Benzmail via Mercedes > wrote: > > Can you hear or feel the relay click when the ignition switch is turned on? > It sounds from all the symptoms like the mechanical relay is bad. Or maybe be > there isn’t enough current to actually activate the relay? You could still > see volts but not current. Did you try running power directly to the relay > off the battery, bypass the ignition switch? > > --FT > Sent from iFōn > >> On May 12, 2023, at 8:04 PM, Dimitri Seretakis via Mercedes >> wrote: >> >> Ok so in addition to the wire that goes to the relay power lug, there is a >> second harness going to the relay which is comprised of 5 wires going into a >> connector. One of these is purple with white stripe. One of these 5 wires, >> not sure which without taking connector apart, is live only when ignition is >> in on position. I’m guessing, therefore, that there is signal from key >> switch? So I’m guessing that if there is power to the relay and there is >> signal from the key switch but there is no power output from the relay at >> the five pins that go to the corresponding glow plugs that the relay is bad. >> But this is a new relay. I realize that a new relay could also be defective >> but I just don’t buy it. What could be going on here? >> >> Sent from my iPhone >> On May 12, 2023, at 5:47 PM, Dimitri Seretakis wrote: >>> I’m not sure how to check for that. There is constant power at the lug on >>> the relay. With the ignition in the on position there is no power at any of >>> the 5 pins on the relay that go to their respective glow plugs. >>> I inspected the chaffed harness and while there are some exposed wires >>> where the insulation has rubbed off, the wires appear to be intact and not >>> obviously shorting on anything. >>> I’m at a loss here. >>> >>> Sent from my iPhone >>> > On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes > wrote: The signal from the keyswitch should be there at the relay. If it's not, of course it won't work. Used to be the purple wire, IIRC. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Can you hear or feel the relay click when the ignition switch is turned on? It sounds from all the symptoms like the mechanical relay is bad. Or maybe be there isn’t enough current to actually activate the relay? You could still see volts but not current. Did you try running power directly to the relay off the battery, bypass the ignition switch? --FT Sent from iFōn > On May 12, 2023, at 8:04 PM, Dimitri Seretakis via Mercedes > wrote: > > Ok so in addition to the wire that goes to the relay power lug, there is a > second harness going to the relay which is comprised of 5 wires going into a > connector. One of these is purple with white stripe. One of these 5 wires, > not sure which without taking connector apart, is live only when ignition is > in on position. I’m guessing, therefore, that there is signal from key > switch? So I’m guessing that if there is power to the relay and there is > signal from the key switch but there is no power output from the relay at the > five pins that go to the corresponding glow plugs that the relay is bad. But > this is a new relay. I realize that a new relay could also be defective but I > just don’t buy it. What could be going on here? > > Sent from my iPhone > >> On May 12, 2023, at 5:47 PM, Dimitri Seretakis wrote: >> I’m not sure how to check for that. There is constant power at the lug on >> the relay. With the ignition in the on position there is no power at any of >> the 5 pins on the relay that go to their respective glow plugs. >> I inspected the chaffed harness and while there are some exposed wires where >> the insulation has rubbed off, the wires appear to be intact and not >> obviously shorting on anything. >> I’m at a loss here. >> >> Sent from my iPhone >> On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes wrote: >>> >>> The signal from the keyswitch should be there at the relay. If it's not, >>> of course it won't work. Used to be the purple wire, IIRC. >>> >>> -- Jim >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Ok so in addition to the wire that goes to the relay power lug, there is a second harness going to the relay which is comprised of 5 wires going into a connector. One of these is purple with white stripe. One of these 5 wires, not sure which without taking connector apart, is live only when ignition is in on position. I’m guessing, therefore, that there is signal from key switch? So I’m guessing that if there is power to the relay and there is signal from the key switch but there is no power output from the relay at the five pins that go to the corresponding glow plugs that the relay is bad. But this is a new relay. I realize that a new relay could also be defective but I just don’t buy it. What could be going on here? Sent from my iPhone > On May 12, 2023, at 5:47 PM, Dimitri Seretakis wrote: > I’m not sure how to check for that. There is constant power at the lug on > the relay. With the ignition in the on position there is no power at any of > the 5 pins on the relay that go to their respective glow plugs. > I inspected the chaffed harness and while there are some exposed wires where > the insulation has rubbed off, the wires appear to be intact and not > obviously shorting on anything. > I’m at a loss here. > > Sent from my iPhone > >> On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes >> wrote: >> >> The signal from the keyswitch should be there at the relay. If it's not, >> of course it won't work. Used to be the purple wire, IIRC. >> >> -- Jim >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
I’m not sure how to check for that. There is constant power at the lug on the relay. With the ignition in the on position there is no power at any of the 5 pins on the relay that go to their respective glow plugs. I inspected the chaffed harness and while there are some exposed wires where the insulation has rubbed off, the wires appear to be intact and not obviously shorting on anything. I’m at a loss here. Sent from my iPhone > On May 12, 2023, at 12:43 AM, Jim Cathey via Mercedes > wrote: > > The signal from the keyswitch should be there at the relay. If it's not, > of course it won't work. Used to be the purple wire, IIRC. > > -- Jim > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
I had the opportunity to get a Fluke (probably several) from a previous employer when a building was closed down. Sadly I didn't realize that I wanted/needed one and passed... -Curt On Friday, May 12, 2023 at 12:13:28 AM EDT, Jim Cathey wrote: > The Harbor Freight $20 multi-meter is pretty good for the money. I like them > for keeping in places where they might get taken/damaged. I keep one at the > vast northern estate. Yeah, but once you've used a Fluke you'll never go back. I have three. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
They're awful. This one is much better: https://www.harborfreight.com/electrical/electrician-s-tools/multimeters-testers/11-function-digital-multimeter-with-audible-continuity-61593.html -Curt On Thursday, May 11, 2023 at 07:28:44 PM EDT, Allan Streib via Mercedes wrote: Here's the ultimate el-cheapo HF meter https://www.harborfreight.com/electrical/electrician-s-tools/multimeters-testers/7-function-digital-multimeter-63759.html On Thu, May 11, 2023, at 18:23, Dimitri Seretakis via Mercedes wrote: > That one looks pretty nifty. > > Sent from my iPhone > >> On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes >> wrote: >> >> But wait! There’s an even better one for just a few bucks more! >> >> https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 >> >> -D >> >>> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes >>> wrote: >>> >>> I might get that one. >>> >>> Sent from my iPhone >>> > On May 11, 2023, at 4:32 PM, mitch--- via Mercedes > wrote: On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: > The Harbor Freight $20 multi-meter is pretty good for the money. I > like them for keeping in places where they might get taken/damaged. I > keep one at the vast northern estate. This one is my new favorite cheap meter. When I bought it the coupon offer was 40% off, currently 25%. I don't know if the coupon checkbox shows for non-Prime members. https://www.amazon.com/dp/B07SHLS639 Walmart used to have the non-autoranging version online for $9.99 but it looks like it's gone now. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
On Thu, 11 May 2023 21:16:06 -0700 Jim Cathey wrote: > 400+V is death waiting to happen. You do NOT screw around > at those voltage levels. The electrical safety classes I attended at Los Alamos National Laboratory showed videos of what happened when mistakes were made working around 408 3-phase. Definitely not pretty. The safety standards REQUIRED full spaceman-like suits. Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
The signal from the keyswitch should be there at the relay. If it's not, of course it won't work. Used to be the purple wire, IIRC. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
400+V is death waiting to happen. You do NOT screw around at those voltage levels. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
> The Harbor Freight $20 multi-meter is pretty good for the money. I like them > for keeping in places where they might get taken/damaged. I keep one at the > vast northern estate. Yeah, but once you've used a Fluke you'll never go back. I have three. -- Jim ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
This is the kind of issue one expects from BMWs, not Mercedes. Very disappointing. On Thu, May 11, 2023 at 10:38 PM Peter Frederick via Mercedes < mercedes@okiebenz.com> wrote: > Check for broken solder in the pins and wires in the connector. It’s > possible the keyswitch is bad too, although unlikely. > > Have someone operate the key switch while you listen for the relay to > close. If it does, investigate why the glow plugs aren’t getting hot, if > it doesn’t, make sure the coil i the relay is getting 12V and figure out > why not. > > > > On May 11, 2023, at 1:48 PM, Dimitri Seretakis via Mercedes < > mercedes@okiebenz.com> wrote: > > > > So I replaced the GP relay on the 1990 300D 2.5T but it’s still not > glowing. Light does not come on at all. I was able to start the car as some > suggested after cranking for quite a bit. I replaced all the glow plugs a > couple of years ago so I don’t think that’s the issue either. It must be > some thing before the relay. Is there some kind of control in the ignition > switch or something? > > > > Sent from my iPhone > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Check for broken solder in the pins and wires in the connector. It’s possible the keyswitch is bad too, although unlikely. Have someone operate the key switch while you listen for the relay to close. If it does, investigate why the glow plugs aren’t getting hot, if it doesn’t, make sure the coil i the relay is getting 12V and figure out why not. > On May 11, 2023, at 1:48 PM, Dimitri Seretakis via Mercedes > wrote: > > So I replaced the GP relay on the 1990 300D 2.5T but it’s still not glowing. > Light does not come on at all. I was able to start the car as some suggested > after cranking for quite a bit. I replaced all the glow plugs a couple of > years ago so I don’t think that’s the issue either. It must be some thing > before the relay. Is there some kind of control in the ignition switch or > something? > > Sent from my iPhone > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
They used to give those away if you bought something. I have 3 or 4 of them here and there. Maybe 5 or 6. --FT Sent from iFōn > On May 11, 2023, at 7:28 PM, Allan Streib via Mercedes > wrote: > > Here's the ultimate el-cheapo HF meter > > https://www.harborfreight.com/electrical/electrician-s-tools/multimeters-testers/7-function-digital-multimeter-63759.html > > >> On Thu, May 11, 2023, at 18:23, Dimitri Seretakis via Mercedes wrote: >> That one looks pretty nifty. >> >> Sent from my iPhone >> On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes wrote: >>> >>> But wait! There’s an even better one for just a few bucks more! >>> >>> https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 >>> >>> -D >>> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes wrote: I might get that one. Sent from my iPhone >> On May 11, 2023, at 4:32 PM, mitch--- via Mercedes >> wrote: > > On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: >> The Harbor Freight $20 multi-meter is pretty good for the money. I >> like them for keeping in places where they might get taken/damaged. I >> keep one at the vast northern estate. > > This one is my new favorite cheap meter. > When I bought it the coupon offer was 40% off, currently 25%. > I don't know if the coupon checkbox shows for non-Prime members. > https://www.amazon.com/dp/B07SHLS639 > > Walmart used to have the non-autoranging version online for $9.99 but it > looks like it's gone now. > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Dimitri, it has been 7 years since I had that but my sketchy memory is that there was fuse for GP relay maybe on right side inner fender. Dwight On Thu, May 11, 2023, 7:24 PM Dimitri Seretakis via Mercedes < mercedes@okiebenz.com> wrote: > That one looks pretty nifty. > > Sent from my iPhone > > > On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes < > mercedes@okiebenz.com> wrote: > > > > But wait! There’s an even better one for just a few bucks more! > > > > > https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 > > > > -D > > > >> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes < > mercedes@okiebenz.com> wrote: > >> > >> I might get that one. > >> > >> Sent from my iPhone > >> > On May 11, 2023, at 4:32 PM, mitch--- via Mercedes < > mercedes@okiebenz.com> wrote: > >>> > >>> On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: > The Harbor Freight $20 multi-meter is pretty good for the money. I > like them for keeping in places where they might get taken/damaged. I > keep one at the vast northern estate. > >>> > >>> This one is my new favorite cheap meter. > >>> When I bought it the coupon offer was 40% off, currently 25%. > >>> I don't know if the coupon checkbox shows for non-Prime members. > >>> https://www.amazon.com/dp/B07SHLS639 > >>> > >>> Walmart used to have the non-autoranging version online for $9.99 but > it looks like it's gone now. > >>> > >>> ___ > >>> http://www.okiebenz.com > >>> > >>> To search list archives http://www.okiebenz.com/archive/ > >>> > >>> To Unsubscribe or change delivery options go to: > >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >>> > >> > >> > >> ___ > >> http://www.okiebenz.com > >> > >> To search list archives http://www.okiebenz.com/archive/ > >> > >> To Unsubscribe or change delivery options go to: > >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > >> > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Here's the ultimate el-cheapo HF meter https://www.harborfreight.com/electrical/electrician-s-tools/multimeters-testers/7-function-digital-multimeter-63759.html On Thu, May 11, 2023, at 18:23, Dimitri Seretakis via Mercedes wrote: > That one looks pretty nifty. > > Sent from my iPhone > >> On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes >> wrote: >> >> But wait! There’s an even better one for just a few bucks more! >> >> https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 >> >> -D >> >>> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes >>> wrote: >>> >>> I might get that one. >>> >>> Sent from my iPhone >>> > On May 11, 2023, at 4:32 PM, mitch--- via Mercedes > wrote: On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: > The Harbor Freight $20 multi-meter is pretty good for the money. I > like them for keeping in places where they might get taken/damaged. I > keep one at the vast northern estate. This one is my new favorite cheap meter. When I bought it the coupon offer was 40% off, currently 25%. I don't know if the coupon checkbox shows for non-Prime members. https://www.amazon.com/dp/B07SHLS639 Walmart used to have the non-autoranging version online for $9.99 but it looks like it's gone now. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
What makes the 2nd one better than the first one? Sent from my iPhone > On May 11, 2023, at 6:24 PM, Dimitri Seretakis via Mercedes > wrote: > > That one looks pretty nifty. > > Sent from my iPhone > >> On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes >> wrote: >> >> But wait! There’s an even better one for just a few bucks more! >> >> https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 >> >> -D >> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes wrote: >>> >>> I might get that one. >>> >>> Sent from my iPhone >>> > On May 11, 2023, at 4:32 PM, mitch--- via Mercedes > wrote: On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: > The Harbor Freight $20 multi-meter is pretty good for the money. I > like them for keeping in places where they might get taken/damaged. I > keep one at the vast northern estate. This one is my new favorite cheap meter. When I bought it the coupon offer was 40% off, currently 25%. I don't know if the coupon checkbox shows for non-Prime members. https://www.amazon.com/dp/B07SHLS639 Walmart used to have the non-autoranging version online for $9.99 but it looks like it's gone now. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
That one looks pretty nifty. Sent from my iPhone > On May 11, 2023, at 5:12 PM, dan penoff.com via Mercedes > wrote: > > But wait! There’s an even better one for just a few bucks more! > > https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 > > -D > >> On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes >> wrote: >> >> I might get that one. >> >> Sent from my iPhone >> On May 11, 2023, at 4:32 PM, mitch--- via Mercedes wrote: >>> >>> On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: The Harbor Freight $20 multi-meter is pretty good for the money. I like them for keeping in places where they might get taken/damaged. I keep one at the vast northern estate. >>> >>> This one is my new favorite cheap meter. >>> When I bought it the coupon offer was 40% off, currently 25%. >>> I don't know if the coupon checkbox shows for non-Prime members. >>> https://www.amazon.com/dp/B07SHLS639 >>> >>> Walmart used to have the non-autoranging version online for $9.99 but it >>> looks like it's gone now. >>> >>> ___ >>> http://www.okiebenz.com >>> >>> To search list archives http://www.okiebenz.com/archive/ >>> >>> To Unsubscribe or change delivery options go to: >>> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >>> >> >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
On Thu, 11 May 2023 21:08:02 + "dan penoff.com via Mercedes" wrote: > > https://www.amazon.com/dp/B07SHLS639 > > That’s pretty cool for $25. I especially like the light up rings around > the banana jacks for the probes so you know where to plug things in > based on the setting. > > -D The picture of the guy measuring 408V 3 phase with a bare left hand and only a thin glove on the right is rather scary. Craig ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
On 2023-05-11 17:12, dan penoff.com via Mercedes wrote: But wait! There’s an even better one for just a few bucks more! https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 Yeah but I never saw that one go 50% off. I don't know that I've ever seen it substantially discounted. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
But wait! There’s an even better one for just a few bucks more! https://www.amazon.com/KAIWEETS-Multimeter-Electrical-Capacitance-Temperature-dp-B09GF2FZVY/dp/B09GF2FZVY/ref=dp_ob_title_def?th=1 -D > On May 11, 2023, at 5:10 PM, Dimitri Seretakis via Mercedes > wrote: > > I might get that one. > > Sent from my iPhone > >> On May 11, 2023, at 4:32 PM, mitch--- via Mercedes >> wrote: >> >> On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: >>> The Harbor Freight $20 multi-meter is pretty good for the money. I >>> like them for keeping in places where they might get taken/damaged. I >>> keep one at the vast northern estate. >> >> This one is my new favorite cheap meter. >> When I bought it the coupon offer was 40% off, currently 25%. >> I don't know if the coupon checkbox shows for non-Prime members. >> https://www.amazon.com/dp/B07SHLS639 >> >> Walmart used to have the non-autoranging version online for $9.99 but it >> looks like it's gone now. >> >> ___ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
I might get that one. Sent from my iPhone > On May 11, 2023, at 4:32 PM, mitch--- via Mercedes > wrote: > > On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: >> The Harbor Freight $20 multi-meter is pretty good for the money. I >> like them for keeping in places where they might get taken/damaged. I >> keep one at the vast northern estate. > > This one is my new favorite cheap meter. > When I bought it the coupon offer was 40% off, currently 25%. > I don't know if the coupon checkbox shows for non-Prime members. > https://www.amazon.com/dp/B07SHLS639 > > Walmart used to have the non-autoranging version online for $9.99 but it > looks like it's gone now. > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
That’s pretty cool for $25. I especially like the light up rings around the banana jacks for the probes so you know where to plug things in based on the setting. -D > On May 11, 2023, at 4:31 PM, mitch--- via Mercedes > wrote: > > On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: >> The Harbor Freight $20 multi-meter is pretty good for the money. I >> like them for keeping in places where they might get taken/damaged. I >> keep one at the vast northern estate. > > This one is my new favorite cheap meter. > When I bought it the coupon offer was 40% off, currently 25%. > I don't know if the coupon checkbox shows for non-Prime members. > https://www.amazon.com/dp/B07SHLS639 > > Walmart used to have the non-autoranging version online for $9.99 but it > looks like it's gone now. > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
I went to Ace hardware and got a test lamp. The relay has power. I then tested a singular glow plug and it had no power so I proceeded to inspect the harness from the relay to the plugs and found that it was chafed and had visible conductor material. If the wire to one or even some of the plugs was affected then there would still be some glowing action but there is none. The glow plug light would do some thing like not turn on and then once the car starts, turn on for so many seconds. Therefore I suspect that the ground wire is shorted. Is it worth it to try to repair the harness? Should I try to find a new harness? Sent from my iPhone > On May 11, 2023, at 2:55 PM, Randy Bennell via Mercedes > wrote: > > Is there power at the relay? > Is there a fuse before it? > Are there ground connections that need to be cleaned? > > Randy > > >> On 11/05/2023 1:48 PM, Dimitri Seretakis via Mercedes wrote: >> So I replaced the GP relay on the 1990 300D 2.5T but it’s still not glowing. >> Light does not come on at all. I was able to start the car as some suggested >> after cranking for quite a bit. I replaced all the glow plugs a couple of >> years ago so I don’t think that’s the issue either. It must be some thing >> before the relay. Is there some kind of control in the ignition switch or >> something? >> >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
On 2023-05-11 15:08, Curt Raymond via Mercedes wrote: The Harbor Freight $20 multi-meter is pretty good for the money. I like them for keeping in places where they might get taken/damaged. I keep one at the vast northern estate. This one is my new favorite cheap meter. When I bought it the coupon offer was 40% off, currently 25%. I don't know if the coupon checkbox shows for non-Prime members. https://www.amazon.com/dp/B07SHLS639 Walmart used to have the non-autoranging version online for $9.99 but it looks like it's gone now. ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
The Harbor Freight $20 multi-meter is pretty good for the money. I like them for keeping in places where they might get taken/damaged. I keep one at the vast northern estate. -Curt On Thursday, May 11, 2023 at 03:01:59 PM EDT, Dimitri Seretakis via Mercedes wrote: There is no fuse before it that I’m aware of. This relay doesn’t have a strip fuse like some others. I haven’t checked if there is power to the relay yet because my stupid voltmeter is broken! Sent from my iPhone > On May 11, 2023, at 2:55 PM, Randy Bennell via Mercedes > wrote: > > Is there power at the relay? > Is there a fuse before it? > Are there ground connections that need to be cleaned? > > Randy > > >> On 11/05/2023 1:48 PM, Dimitri Seretakis via Mercedes wrote: >> So I replaced the GP relay on the 1990 300D 2.5T but it’s still not glowing. >> Light does not come on at all. I was able to start the car as some suggested >> after cranking for quite a bit. I replaced all the glow plugs a couple of >> years ago so I don’t think that’s the issue either. It must be some thing >> before the relay. Is there some kind of control in the ignition switch or >> something? >> >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Contact the Classic Center. They can send you the schematic. On Thu, May 11, 2023 at 3:01 PM Dimitri Seretakis via Mercedes < mercedes@okiebenz.com> wrote: > There is no fuse before it that I’m aware of. This relay doesn’t have a > strip fuse like some others. I haven’t checked if there is power to the > relay yet because my stupid voltmeter is broken! > > Sent from my iPhone > > > On May 11, 2023, at 2:55 PM, Randy Bennell via Mercedes < > mercedes@okiebenz.com> wrote: > > > > Is there power at the relay? > > Is there a fuse before it? > > Are there ground connections that need to be cleaned? > > > > Randy > > > > > >> On 11/05/2023 1:48 PM, Dimitri Seretakis via Mercedes wrote: > >> So I replaced the GP relay on the 1990 300D 2.5T but it’s still not > glowing. Light does not come on at all. I was able to start the car as some > suggested after cranking for quite a bit. I replaced all the glow plugs a > couple of years ago so I don’t think that’s the issue either. It must be > some thing before the relay. Is there some kind of control in the ignition > switch or something? > >> > >> > > > > > > ___ > > http://www.okiebenz.com > > > > To search list archives http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
There is no fuse before it that I’m aware of. This relay doesn’t have a strip fuse like some others. I haven’t checked if there is power to the relay yet because my stupid voltmeter is broken! Sent from my iPhone > On May 11, 2023, at 2:55 PM, Randy Bennell via Mercedes > wrote: > > Is there power at the relay? > Is there a fuse before it? > Are there ground connections that need to be cleaned? > > Randy > > >> On 11/05/2023 1:48 PM, Dimitri Seretakis via Mercedes wrote: >> So I replaced the GP relay on the 1990 300D 2.5T but it’s still not glowing. >> Light does not come on at all. I was able to start the car as some suggested >> after cranking for quite a bit. I replaced all the glow plugs a couple of >> years ago so I don’t think that’s the issue either. It must be some thing >> before the relay. Is there some kind of control in the ignition switch or >> something? >> >> > > > ___ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] 300D 2.5 Glow Plug Relay
Is there power at the relay? Is there a fuse before it? Are there ground connections that need to be cleaned? Randy On 11/05/2023 1:48 PM, Dimitri Seretakis via Mercedes wrote: So I replaced the GP relay on the 1990 300D 2.5T but it’s still not glowing. Light does not come on at all. I was able to start the car as some suggested after cranking for quite a bit. I replaced all the glow plugs a couple of years ago so I don’t think that’s the issue either. It must be some thing before the relay. Is there some kind of control in the ignition switch or something? ___ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
