Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
You must have a different trouble shooting manual. Jim wrote: I'm referring to the paper ACC manual I got for my SL. Back when you could still get paper manuals from the dealer. It would seem that since the resistor unit, the fan, the temperature control unit, the fan control unit, the pushbutton unit, and the compressor are all disconnected; that I shouldn't get any heavy current flow at the fuse terminal, and I should get zero resistance between the listed ground wires to a frame or body ground. Yep, that should do it. Nothing much left but wires in the chassis at that point. Except for the sensors and vacuum actuators. Oh, and the Klima relay perhaps. (Not exactly sure if your car has one. Too many cars...) You could run the checklist I have: http://userweb.windwireless.net/~jimc/mamerepairs.html Though it's fairly weak for that particular system. Like I said, I've only had PB problems on my cars with that system, so that's all I've really covered. (As I learn things on broken cars I amend that page.) -- Jim __ If the Klima is the little plug-in relay that sits on top of the left front wheel well, then I have one. It's under a plastic snap-on cover with the relay that runs the A/C auxiliary fan. I'll unplug both of them before doing the recheck. That checklist is very useful. Thanks, Gerry -- next part -- No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
You must have a different trouble shooting manual. I'm referring to the paper ACC manual I got for my SL. Back when you could still get paper manuals from the dealer. It would seem that since the resistor unit, the fan, the temperature control unit, the fan control unit, the pushbutton unit, and the compressor are all disconnected; that I shouldn't get any heavy current flow at the fuse terminal, and I should get zero resistance between the listed ground wires to a frame or body ground. Yep, that should do it. Nothing much left but wires in the chassis at that point. Except for the sensors and vacuum actuators. Oh, and the Klima relay perhaps. (Not exactly sure if your car has one. Too many cars...) You could run the checklist I have: http://userweb.windwireless.net/~jimc/mamerepairs.html Though it's fairly weak for that particular system. Like I said, I've only had PB problems on my cars with that system, so that's all I've really covered. (As I learn things on broken cars I amend that page.) -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
What I think happened was that I hit two buttons simultaneously and caused a big short in the pushbutton unit, but who knows? Gerry No, that won't do it. The ACC manual even details what happens in various multiple-button situations. No harm, just odd behavior. -- Jim ___ You must have a different trouble shooting manual. I can't find any troubleshooting in this one other than the basic use of the ammeter, voltmeter, and resistance circuit testing unless I missed it somehow. This one is SM (service manual?) 1243 (rev. 7-85). If what you describe is on the disc, I've got to hunt for it. It may be in the shop. It would seem that since the resistor unit, the fan, the temperature control unit, the fan control unit, the pushbuttton unit, and the compressor are all disconnected; that I shouldn't get any heavy current flow at the fuse terminal, and I should get zero resisitance between the listed ground wires to a frame or body ground. I've checked all that but I'll check it again. Gerry - -- next part -- No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
What I think happened was that I hit two buttons simultaneously and caused a big short in the pushbutton unit, but who knows? No, that won't do it. The ACC manual even details what happens in various multiple-button situations. No harm, just odd behavior. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
From: Jim Cathey This is going to be a puckery situation when I fire up the restored system the first time since nothing on the MB electrical repair manual checks out on resistance, ground, or hot versus wire number. You can remove the blower speed regulator and apply +12V to the correct succession of pins on its connector and see that the blower motor responds correctly. It is unlikely that they died, given the tough nature of their job. They rarely fail, in other words. You'll need the ACC schematic to do this. It's the sort of thing I'd have on my repair/diagnosis checklist, except that I never worked it out because the blower speed regulator was not bad on any car I worked on. -- Jim -- The repair manual shows the pin numbers and where "some" of them go to but I haven't found any schematics for the solid state motor speed control unit. The schematic only shows the pin numbers, and then you look up whichever solid state unit; blower, or resistor unit you're interested in. Think I'll do some more checking, especially the ground pins, because the resistance pin to ground did not show a dead short like it would seem it should. Fortunately the blower didn't get damaged. Thanks, Gerry -- next part -- No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
The troubleshooting manual shows: Models 300D/CD/TD for Model years 1983-1985. I took the resistor unit off and found the following part numbers and looked them up on Rustys catalog: 000 821 2760 05 8009 30 60 Wow! Didn't know they cost that much. You'd probably better hang on to yours, Chris. I've read about several instances of them failing. Mine is "probably" okay. I didn't get the exact same resistances on the different coils as shown in the manual but they were close, there were no open coils, and there were no shorts. Probably safe enough to try it. What I think happened was that I hit two buttons simultaneously and caused a big short in the pushbutton unit, but who knows? Thanks, Gerry --- - Original Message - From: Christopher McCann To: Mercedes Discussion List Sent: Wednesday, March 11, 2009 10:14 PM Subject: Re: [MBZ] Need resistor unit for fan on '83 300D Turbo Is it the same as one on a W126 SD? Chris --- On Wed, 3/11/09, Christopher McCann wrote: From: Christopher McCann Subject: Re: [MBZ] Need resistor unit for fan on '83 300D Turbo To: "Mercedes Discussion List" Date: Wednesday, March 11, 2009, 9:12 PM OH MY GOSH! Rusty gets $265 for one ($374 MSRP). I have a spare, but now I'm a bit leery to let it go. Do these things fail often? I don't think they do... Chris --- On Wed, 3/11/09, Archer wrote: > From: Archer > Subject: [MBZ] Need resistor unit for fan on '83 300D Turbo > To: "Mercedes Discussion List" > Date: Wednesday, March 11, 2009, 8:53 PM > I put a request for a resistor assembly for the blower on an > '83 300D Turbo on the bottom of someone elses request > for parts and that was probably a mistake, so here's the > request again: > > I need the resistor unit which is inside a cage and sits on > the right wheel well under the hood on an '83 300D > Turbo. > This works with the solid state blower speed control module > above the glove box. > I initially thought that only the solid state modules; > pushbutton, heat control module, and blower speed control > module; were all that got fried when everything shorted out > on the climate control system; but I'm now thinking I > ought to replace the resistor module as well just to be on > the safe side. (I've already found the solid state > replacement units.) > > This is going to be a puckery situation when I fire up the > restored system the first time since nothing on the MB > electrical repair manual checks out on resistance, ground, > or hot versus wire number. I'm still playing with it > and trying to make heads or tails of it, but there are > something like 30+ wires going to plugs on the four units. > > I can send you a check, money order, or pay you via paypal. > Thanks, > Gerry -- next part -- > > No virus found in this outgoing message. > Checked by AVG - www.avg.com Version: 8.0.237 / Virus > Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 > ___ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 -- next part -- No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
This is going to be a puckery situation when I fire up the restored system the first time since nothing on the MB electrical repair manual checks out on resistance, ground, or hot versus wire number. You can remove the blower speed regulator and apply +12V to the correct succession of pins on its connector and see that the blower motor responds correctly. It is unlikely that they died, given the tough nature of their job. They rarely fail, in other words. You'll need the ACC schematic to do this. It's the sort of thing I'd have on my repair/diagnosis checklist, except that I never worked it out because the blower speed regulator was not bad on any car I worked on. -- Jim ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
Is it the same as one on a W126 SD? Chris --- On Wed, 3/11/09, Christopher McCann wrote: > From: Christopher McCann > Subject: Re: [MBZ] Need resistor unit for fan on '83 300D Turbo > To: "Mercedes Discussion List" > Date: Wednesday, March 11, 2009, 9:12 PM > OH MY GOSH! Rusty gets $265 for one ($374 MSRP). I have a > spare, but now I'm a bit leery to let it go. > > Do these things fail often? I don't think they do... > > Chris > > > --- On Wed, 3/11/09, Archer > wrote: > > > From: Archer > > Subject: [MBZ] Need resistor unit for fan on '83 > 300D Turbo > > To: "Mercedes Discussion List" > > > Date: Wednesday, March 11, 2009, 8:53 PM > > I put a request for a resistor assembly for the blower > on an > > '83 300D Turbo on the bottom of someone elses > request > > for parts and that was probably a mistake, so > here's the > > request again: > > > > I need the resistor unit which is inside a cage and > sits on > > the right wheel well under the hood on an '83 300D > > Turbo. > > This works with the solid state blower speed control > module > > above the glove box. > > I initially thought that only the solid state modules; > > pushbutton, heat control module, and blower speed > control > > module; were all that got fried when everything > shorted out > > on the climate control system; but I'm now > thinking I > > ought to replace the resistor module as well just to > be on > > the safe side. (I've already found the solid > state > > replacement units.) > > > > This is going to be a puckery situation when I fire up > the > > restored system the first time since nothing on the MB > > electrical repair manual checks out on resistance, > ground, > > or hot versus wire number. I'm still playing with > it > > and trying to make heads or tails of it, but there are > > something like 30+ wires going to plugs on the four > units. > > > > I can send you a check, money order, or pay you via > paypal. > > Thanks, > > Gerry -- next part -- > > > > No virus found in this outgoing message. > > Checked by AVG - www.avg.com Version: 8.0.237 / Virus > > Database: 270.11.10/1996 - Release Date: 03/11/09 > 20:42:00 > > ___ > > http://www.okiebenz.com > > For new and used parts go to www.okiebenz.com > > To search list archives > http://www.okiebenz.com/archive/ > > > > To Unsubscribe or change delivery options go to: > > > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > > > > > ___ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
Re: [MBZ] Need resistor unit for fan on '83 300D Turbo
OH MY GOSH! Rusty gets $265 for one ($374 MSRP). I have a spare, but now I'm a bit leery to let it go. Do these things fail often? I don't think they do... Chris --- On Wed, 3/11/09, Archer wrote: > From: Archer > Subject: [MBZ] Need resistor unit for fan on '83 300D Turbo > To: "Mercedes Discussion List" > Date: Wednesday, March 11, 2009, 8:53 PM > I put a request for a resistor assembly for the blower on an > '83 300D Turbo on the bottom of someone elses request > for parts and that was probably a mistake, so here's the > request again: > > I need the resistor unit which is inside a cage and sits on > the right wheel well under the hood on an '83 300D > Turbo. > This works with the solid state blower speed control module > above the glove box. > I initially thought that only the solid state modules; > pushbutton, heat control module, and blower speed control > module; were all that got fried when everything shorted out > on the climate control system; but I'm now thinking I > ought to replace the resistor module as well just to be on > the safe side. (I've already found the solid state > replacement units.) > > This is going to be a puckery situation when I fire up the > restored system the first time since nothing on the MB > electrical repair manual checks out on resistance, ground, > or hot versus wire number. I'm still playing with it > and trying to make heads or tails of it, but there are > something like 30+ wires going to plugs on the four units. > > I can send you a check, money order, or pay you via paypal. > Thanks, > Gerry -- next part -- > > No virus found in this outgoing message. > Checked by AVG - www.avg.com Version: 8.0.237 / Virus > Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 > ___ > http://www.okiebenz.com > For new and used parts go to www.okiebenz.com > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
[MBZ] Need resistor unit for fan on '83 300D Turbo
I put a request for a resistor assembly for the blower on an '83 300D Turbo on the bottom of someone elses request for parts and that was probably a mistake, so here's the request again: I need the resistor unit which is inside a cage and sits on the right wheel well under the hood on an '83 300D Turbo. This works with the solid state blower speed control module above the glove box. I initially thought that only the solid state modules; pushbutton, heat control module, and blower speed control module; were all that got fried when everything shorted out on the climate control system; but I'm now thinking I ought to replace the resistor module as well just to be on the safe side. (I've already found the solid state replacement units.) This is going to be a puckery situation when I fire up the restored system the first time since nothing on the MB electrical repair manual checks out on resistance, ground, or hot versus wire number. I'm still playing with it and trying to make heads or tails of it, but there are something like 30+ wires going to plugs on the four units. I can send you a check, money order, or pay you via paypal. Thanks, Gerry -- next part -- No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.10/1996 - Release Date: 03/11/09 20:42:00 ___ http://www.okiebenz.com For new and used parts go to www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
