Blower fan stopped working?

2006 CHEVROLET SUBURBAN

205,000 MILES • 5.3L • V8 • 4WD • AUTOMATIC

CHRIS QUEISER

MEMBER
1 POST

My blower fan quit working. I replaced the blower, resistor and head unit in the dash and wire harness. The blower works when it's out of its hole but once I mount it back in properly it won't work at all. Am I missing something?

Mar 4, 2023 at 1:40 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Hello Chris,

It sounds like the power leads or ground is not working, here is a guide to show you how to test the power and ground lead to the blower motor. Turn the blower on high speed to check for power. Also check the BLWR fuse under the hood for power as well. If you test the ground wire (black) with the blower on and the wire lights up the test light the ground is bad.

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

and

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

Also, I have included the blower motor wiring diagrams so you can see how the system works. Check out the images (below). Please let us know what you find. We are interested to see what it is.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Mar 5, 2023 at 5:00 PM

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.