Hi there I thing I have a short on my 1994 S350 turbodiesel
I need help testing the window wiring, the color code is not the same on both ends motor to switch and the power feed is 12v on both leads in the motor plug is this normal?
Can some one provide a schematic please.

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1994 ~ S420


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1998 Monaco Dynasty 40'
1994 S420, 1999 Ford ClubWagen

here are the wiring diagrams

http://www.autolib.diakom.ru/CAR/Mercedes-Benz/1994/S350/SYSTEM%20WIRING%20DIAGRAMS/

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Thank you very much that is exactly what I need have a wonderful day..

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1994 ~ S420


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1998 Monaco Dynasty 40'
1994 S420, 1999 Ford ClubWagen

On the W123s the Motor is not grounded through the Chassis like a Starter Motor is.

The Window Motor Direction Change is done by the Window Switch alternating polarity; the Ground is though the Window Switch.

That means if you are probing with a Volt Meter and one Probe of the Volt Meter is grounded to the Chassis no matter which direction you move the Window Switch you will get 12 Volts.

If you were to hook your Voltmeter in series with one of the Window Motor Wires when you push the switch one way you would get + 12 Volts (on a Digital Volt Meter) and when you push the other side of the Switch you would get a -12 Volts.

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84 300D, 82 Volvo 244Gl Diesel

Thanks,.... much aprisiated.........

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1994 ~ S420


~~~~~~~~~~~~~~~~~~~~~~~~
1998 Monaco Dynasty 40'
1994 S420, 1999 Ford ClubWagen