The driver's side power window on my 1990 5.8L is not working. I'm assuming that the motor is out, but it hasn't worked since I've owned it and now that its getting hot, I would like to be able to put the window down. Before I order a new motor, are there any other common problems that would cause the window to stop working or other simple fixes I should try first that might save me a few bucks?
Power windows
- Thread starter PackMan22
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Seabronc
New member
Quite often that is caused by a broken wire inside the rubber conduit that they pass through from the A-post to the door. It could be either side and is caused by the constant flexing from opening and closing the door. Attached is a wiring diagram for a 92 but is the same for your truck. C213 is behind the right hand cowl panel by the passengers foot area.
Check for 12V at the passenger door switch on the light blue with black stripe wire. It should be hot when the key is in the Accessory or Run position. If you have 12V there try a temporary ground on the Red with black stripe wire to see if the motor will lower the window. If that works, Grounding the other wire, Yellow with black stripe, will allow you to put the window back up. So the initial suspects are the 12V line or the ground line that runs from the driver side door to the passenger side door.
Good luck,
Check for 12V at the passenger door switch on the light blue with black stripe wire. It should be hot when the key is in the Accessory or Run position. If you have 12V there try a temporary ground on the Red with black stripe wire to see if the motor will lower the window. If that works, Grounding the other wire, Yellow with black stripe, will allow you to put the window back up. So the initial suspects are the 12V line or the ground line that runs from the driver side door to the passenger side door.
Good luck,
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