Heater quit working

2005 CHEVROLET COLORADO

20,000 MILES • 4WD

THERESA WALSH BYERS

MEMBER
1 POST

Husband changed blower resister and the plug. The blower motor is getting power, checked it with a tester and he straight wired the blower motor so he knows it runs. After he puts everything back together heater still doesn’t work. Help! We’re not mechanics, just trying to save a huge shop bill because he says it’s got to be something simple.

Feb 3, 2020 at 7:23 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

Good morning,

I attached a wiring diagram for you to view. Make sure with the key on you have power on both sides of the blower motor.

Power goes from there to the blower resistor and the control module. Check the fuses for power to the module.

The issue is either wiring or the control module itself.

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

Let me know the results.

Roy

Images (Click to enlarge)

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

Feb 4, 2020 at 6:11 AM