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Old 08-18-2013, 07:35 PM
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Join Date: Aug 2013
Posts: 2
1983 MBZ 300sd power window diagram?

I have read for hours. I want to jump the switches in the middle console to see if the motors are working and I need to buy or repair the switch.

Now, all of the windows do not work. (I thought fuse, nope.)

I have:
1. Checked and replaced the fuses
2. I am getting 12V to the pin #6 on the passenger and driver switches.
3. Nothing on the rear windows

Does anyone know or can anyone provide a picture with diagram (not electrical, physical) of what the switch actually does when switched up and back?

I read a post that gave wire color codes. Not what I need. I need a picture with the pins and labels to show how. I think this would be helpful.

Even a diagram like this would help (W126 one single switch with front driver, kid proof, and driver back seat):

Ox Ox
O1 O2
O3 Ox

O5 O4

Ox (run down middle from top 6 but no connection)
O4 Ox
O1 O2
O3 Ox

x - No pin coming down or label
pins 1 & 2 are not exactly across from one another either, but close enough

So if someone can say jump 1 to 2 for window to roll up or whatever. I am not even sure why there are that many wires?

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Old 08-18-2013, 08:31 PM
Registered User
Join Date: Aug 2013
Posts: 2
Update - window issue

So I was wrong.

I was getting power to all #3 (I think.)

What I did was hard line 12v to the b fuse end in breaker box. I saw this on another post.

The issue is really that I am not getting power (when key turned on - normal) to the a or b fuses. So I ran direct to b end (top).

Now they all work except the passenger which I think is a switch issue or motor or relay, whatever.

I did notice that the breaker box setup a & b (connected together) as well as c & d (not connected together) all have a separate insert. Or at least it looks that way. Anyone have any ideas here. I am going to hardwire it for now. How do I take out that insert for a & b? I tried with a screw driver but did not want to damage it further. I need the windows. I have no a/c!!!!!

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