2012 gmc 2500. Driver window will not roll up or down. Have replaced window motor, window switch and checked fuses. Still doesn’t work ?
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Hi @pjwalls
Here's a link to the 2012 GMC Sierra 2500 power windows wiring diagram that may help.
Unfortunately to download it, you need to pay, but at least you can still view it for free.
Hopefully this is of some help.
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Thank you. Gonna have to trace the wires, fun, fun
Perhaps you can cut down the time spent looking by accessing the driver door switch harness connection and disconnect it from the switch and connect an Ohmmeter between terminals E & D on the harness plug and check if you get a resistance reading for the window motor.
If you do this proves the wiring from the switch to the motor but that's all.
If it tests open circuit, then you could access the wires at the motor and then prove which wire i.e. dark blue or brown is faulty by proving continuity from end to end for each wire.
Apologies if you know how to do this already
Good luck
Cheers.
Thank you, I will try that
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