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Air not blowing

Tiny
ROBJUAN14
  • MEMBER
  • 2005 CHEVROLET TRAILBLAZER
  • 4.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 210,000 MILES
I had no heat so I changed blower motor and resister. But before I did that I disconnect the battery. I reconnect the battery and heat worked. Let sit overnight then started with no air blowing. I checked resister harness and looks good. All fuses look good. Any help is appreciated.
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Sunday, January 7th, 2018 AT 4:59 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,667 POSTS
Hello,

When you say resistor do you mean the blower fan control module? We must be losing power somewhere are the trigger from the controller. Here is a guide to help us see whats wrong:

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

Below are the wiring diagrams so we can do some easy testing to find out what is wrong.

Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken
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Tuesday, January 9th, 2018 AT 1:39 PM

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