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

2000 GMC SIERRA
200,000 MILES • 4.8L • V8 • 2WD • AUTOMATIC
Avatar
DOUG COMSTOCK
  • MEMBER
  • 1 POST
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.
May 22, 2025 at 10:58 PM
Advertisement
Avatar
STRAILER
  • ✓Experienced Mechanic
  • 55,065 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.
Image (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
May 23, 2025 at 5:37 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.