Ah, Ok.... the issue here isn't the GP relay at all most likely. The glow plug system and the starter are mostly independent. One will function if the other is faulty, and neither can bring the other one down.
Your problem is, in order of likleyhood: 1. Bad ground at the Battery, chassis connection, or either end of the ground strap to the engine block 2. Failing starter solenoid (tap lightly with a hammer to see if it helps) 3. Failing ignition switch (unlikely, but could no longer pass enough current to the starter solenoid). If its really an issue of the battery going dead, then the GP relay could still be at fault. But you'd know this because you'd have to charge the battery to get the car to start again. Jaime On Sat, Dec 6, 2014 at 6:21 PM, G. M. Brown via Mercedes < mercedes@okiebenz.com> wrote: > Latest on '84 300D GPR: > > From: g_010...@hotmail.com > To: jaime...@gmail.com > Subject: RE: [MBZ] '84 300D GPR > Date: Sat, 6 Dec 2014 14:55:10 -0500 > > > > > Jaime, > As per my previous note, the glow plug lite in the dash lites up OK when > the key is turned to the ON/Start position but, when the condition occurs > when it doesn't start, there's only a slight click and a signal from the > starter as if the battery was almost dead . . . not enough power to turn > the starter enough to start the car. Note, a new glow plug fuse was > installed in March. What I don't understand is that the car wouldn't start > yesterday, but started OK today prior to my doing anything to it. > Thanx. > > Glenn > > Date: Sat, 6 Dec 2014 13:48:39 -0500 > Subject: Re: [MBZ] '84 300D GPR > From: jaime...@gmail.com > To: g_010...@hotmail.com > > Hi Glenn, > This is why information from the internet isn't always so reliable ;-) > Funny... I have the same issue with my 79 300SD. I take apart the relay > once a year to clean it up with deoxit and some paper towels. One of these > days I'll break down and buy a new one, but until then... > One thing you should be weary of is the fuse. It might look good, but not > be able to support the 50+amps when the plugs are glowing. I've seen them > when they look ok, then break in two when you remove them a fiddle with > them a bit. > What exactly is the problem when it doesn't work? No light and no glow? > Or no light with glow? If I remember correctly it is a failure mode for > the light to not come on, but still provide power to the plugs if there is > one or more thats failed. > Good luck,Jaime > > On Sat, Dec 6, 2014 at 1:37 PM, G. M. Brown <g_010...@hotmail.com> wrote: > > > > Jaime, > Prior to going out to the garage to see what else I could do about this, I > found the following from a guy on the PeachParts site: > Yes, you can pull it apart and clean the board/resolder the components. > > > > If it's stuck on just pull the "bucket" off, removing a screw in each of > the four corners. Check the solenoid (the thing that moves) and it's > contacts. Sometimes water will seep in and corrode on the contacts. They > should be smooth. If they're not use a piece of sandpaper or a really > fine file to remove any built up corrosion. > > > > If that doesn't work, just get another one. Unless you want to spend the > time testing and resoldering each component. > > > Today's episode: > 1. The car started OK prior to doing anything. > 2. The glow plug lite in the dash lites up OK when the key is turned to > the ON/Start position. > 3. There's continuity between the two sides of the glow plug fuse. > 4. There's power to each side of the glow plug fuse when the key is turned > to the ON/Start position. > 5. For grins, I DeOxit'd the female pin plugs to the glow plug relay box. > 6. The car started OK after messin' around as well. > > If the bloody thing misbehaves on my attempt to go to church tomorrow, I'm > not sure what else I can do. > > Glenn > Brevard, NC > Date: Sat, 6 Dec 2014 10:42:12 -0500 > Subject: Re: [MBZ] '84 300D GPR > From: jaime...@gmail.com > To: g_010...@hotmail.com; mercedes@okiebenz.com > > I think the problem is that you sanded the contacts. Its like ignition > points, if you sand off the surface coating then the likelyhood that they > corrode and fail again are much higher. > Jaime > > On Fri, Dec 5, 2014 at 5:01 PM, G. M. Brown via Mercedes < > mercedes@okiebenz.com> wrote: > I had a buzzing problem upon starting attempt with the GPR in my '84 300D > back in March, took it apart resoldered the PCB, lightly sanded the contact > points, and cleaned the external pin connections and it's been OK till the > other day when all I would get was a click when attempting to start and it > sounded like the battery was dead. I checked the battery voltage and it's > fine, so I took the GPR apart again, cleaned things up, lightly sanded the > contact points, and DeOxit'd the contact points and external pins and the > car started fine for one day, but it was back to the click and sounding > like the battery is dead. I remembered someone indicating back in March > that moisture can get into the GPR box, but I sealed the edges w/ RTV the > other day. I'll dig into it again tomorrow to see if I can find what the > problem is. > > Any suggestions? TIA. > > > > G. M. Brown > > Brevard, NC > > > > _______________________________________ > > 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 > > > > All posts are the result of individual contributors and as such, those > individuals are responsible for the content of the post. The list owner > has no control over the content of the messages of each contributor. > > > > -- > Jaime Kopchinskihttp://www.jaimekop.com/ > > > > > -- > Jaime Kopchinskihttp://www.jaimekop.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 > > All posts are the result of individual contributors and as such, those > individuals are responsible for the content of the post. The list owner > has no control over the content of the messages of each contributor. > -- Jaime Kopchinski http://www.jaimekop.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 All posts are the result of individual contributors and as such, those individuals are responsible for the content of the post. The list owner has no control over the content of the messages of each contributor.
