[B71ZZZ]

Guys, which one is the power windows relay on an '87 300TD. I'm trying to find out why I lost the power at the fuse. It is fuse G, respective H, right? If I put power to the fuses G and H the windows are working.

 

[augapfel]

Assuming that your 87 is like my 88s, the power window relay is (naturally) the one that is hardest to access: middle row, all the way at the back.

Keep this for future reference:

http://bos-engel.com/benz/boxlayout.JPG

 

[B71ZZZ]

Thanks, Augapfel! Yes, it is the hardest one to get to. I did trace down the problem to the fuse #2. No power there. I got to dig into that, tonight.

 

[augapfel]

Fuse #2 gets power on a red/yellow wire straight from the ignition switch. Good luck.

 

[B71ZZZ]

Fuse #2 gets power on a red/yellow wire straight from the ignition switch. Good luck.

You mean the red/yellow wire that has a black connector, kind of the ones that plugs on the back side of the fuse box?

 

[augapfel]

Um, not sure. What the wiring diagram shows is a red/yellow wire leaving the ignition switch (hot in run) and going straight to the fuse box where it powers fuses A, 1 & 2. It looks like this red/yellow wire is crimped right to the buss bar that serves as a base for thse fuses.

I'll have to take a closer look at the power window circuit.

 

[B71ZZZ]

Um, not sure. What the wiring diagram shows is a red/yellow wire leaving the ignition switch (hot in run) and going straight to the fuse box where it powers fuses A, 1 & 2. It looks like this red/yellow wire is crimped right to the buss bar that serves as a base for thse fuses.

I'll have to take a closer look at the power window circuit.

Yes, you're right. I just traced that orange/yellow wire from the ignition to the fuse box and it has good continuity.

 

[B71ZZZ]

And the winner is: the ignition switch! Great, I just finish the interior swap!

 

[augapfel]

Isn't that always the way it turns out?

 

[B71ZZZ]

True story, funny storry! In december, I gave my spare ignition swich to my friend for his 190. Luckly, about 3-4 years ago, on one of my trips at the junkyard, I took an ignition cylinder when removing a dash. At that time, it was a useless thing to do, because it had no key. Talking about long term investement...
Thanks for your help, Augapfel!

 

[Tyler99]

Same Issue with 83 TD

I've been chasing the same pw issue (all windows occasionally don't work). I replaced the relay and thought it fixed the problem, but it didn't. Now, thankfully, they've stopped working completely (at least for now) so I can check a few things out.
There's power going to the relay from it's fuse but no power at the L/R pw fuses. That seems like it would eliminate any issue with a wire from the ignition (switch replaced 10ys ago anyway). Since the new relay didn't fix the problem it seems like it must be some sort of bad/loose connection but that doesn't seem like it would happen with the plug-ins.
Not having a wiring diagram, do you have any suggestion on ho I could troubleshoot at the relay wiring?
thanks,

 

[Tyler99]

123 Power WindowS Issue

Having trouble getting this in the right place:

Same Issue with 83 TD
I've been chasing the same pw issue (all windows occasionally don't work). I replaced the relay and thought it fixed the problem, but it didn't. Now, thankfully, they've stopped working completely (at least for now) so I can check a few things out.
There's power going to the relay from it's fuse but no power at the L/R pw fuses. That seems like it would eliminate any issue with a wire from the ignition (switch replaced 10ys ago anyway). Since the new relay didn't fix the problem it seems like it must be some sort of bad/loose connection but that doesn't seem like it would happen with the plug-ins.
Not having a wiring diagram, do you have any suggestion on ho I could troubleshoot at the relay wiring?
thanks,