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Power window relay location

Tiny
NICKDAMONE83
  • MEMBER
  • 1992 GMC VANDURA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
Had issues with power window switches not making contact. Took apart and cleaned connections and when I was done they wouldn't work at all. I've checked fuses and all are good. Not sure if it has a relay or where its located. I connected direct power to power window motors and they do in fact work. Any help would be greatly appreciated.
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Tuesday, October 8th, 2019 AT 7:36 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Welcome to 2CarPros.

There isn't one for the power windows. The only relays related to the windows are the heated glass (front) and the rear defroster.

If the fuses are good, have you confirmed power to the switch? If there is power, something may have finally gone bad in the switch itself.

Power is supplied to the power windows via a circuit breaker on the left side of the dash. It isn't a traditional fuse. Take a look at the wiring schematic I attached. I had to break it into three parts for it to fit. It's the entire power window circuit. See if there is power at the switch (pink wire). The key will need to be in the run position. Also, check the black wire for continuity to ground. Here are a few links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

___________________________________

Let me know if this helps.

Take care,
Joe
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Tuesday, October 8th, 2019 AT 8:03 PM
Tiny
NICKDAMONE83
  • MEMBER
  • 6 POSTS
I will surely do these things and I thank you greatly and sincerely for your help. I'll let you know what I figure out. God bless
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Tuesday, October 8th, 2019 AT 8:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Welcome back:

You are very welcome. I will watch for your reply. If you need help or more information, let me know.

Take care,
Joe
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Tuesday, October 8th, 2019 AT 8:38 PM
Tiny
NICKDAMONE83
  • MEMBER
  • 6 POSTS
I actually did post a few more questions about issues I'm having with this particular van. Not sure if you can help or even view these questions but you sound like you know what your talking about. This is the first GMC van I've ever owned. Thanks again
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Tuesday, October 8th, 2019 AT 8:44 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
I will look for your posts. You take care.

Joe
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Thursday, October 10th, 2019 AT 5:48 PM

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