No heater/AC blower power?

2010 GMC SAVANA
77,000 MILES • 6 CYL • 2WD • AUTOMATIC
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OUTDOORSWITHBOB
  • MEMBER
  • 1 POST
I changed the following:
Control panel
fuses
resisters
modules
controls light up
blower fan will not turn on
I forgot to mention:
I have power in the red wire going to the module but no power coming out on the red wire going to the heater motor.
Jul 7, 2023 at 11:24 AM
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STRAILER
  • ✓ASE Certified Mechanic
  • 54,832 POSTS
  • ASE Certified Mechanic
I would check the ground # G102. here is a guide to help and the blower motor wiring diagrams so you can see how the system works, this guide may help as well. It shows how to check the ground.

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

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Jul 7, 2023 at 5:26 PM
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