After changing manual windows to power windows there is no power going to the motors?

Tiny
DOUG COMSTOCK
  • MEMBER
  • 2000 GMC SIERRA
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
I changed my manual windows to power windows and cannot get any power to motors and want to keep it stock. What can I do to get them to work? It has factory door locks that work.
Friday, May 23rd, 2025 AT 5:58 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
It is kind of a weird system, the driver side window motor just uses power and ground through the switch but the passenger side uses an up relay and a down relay. Here are the wiring diagrams so you can see how the system works, where you get power from in the fuse panel and what wires are grounded. Check out the images (below). Let us know how it goes.
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Friday, May 23rd, 2025 AT 12:37 PM

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