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HVAC Wiring diagram needed?

Tiny
BUZZER67
  • MEMBER
  • 2012 CHEVROLET TAHOE
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
Diagnosing no front HVAC blower motor. I am looking for HVAC wiring diagram for the vehicle listed above. The control voltage wire, is it fused? Getting voltage to blower motor control module. No voltage out to motor. Module is new. Motor is new.
Monday, September 4th, 2023 AT 6:56 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,702 POSTS
It sounds like you have a bad ground G200 right in front of the HVAC case. Here is a guide that can help, and I have included the HVAC wiring diagrams so you can see how the system works and which wires to test.

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

or

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

Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
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Tuesday, September 5th, 2023 AT 12:28 PM

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