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Blower motor doesn't work

Tiny
SVJORN
  • MEMBER
  • 2008 GMC ACADIA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 52,000 MILES
The blower wont come on on our vehicle even though it shows the bars lit up as if it is on. The fuses are all good and I can't seem to find a relay any where for the fan.
Monday, June 20th, 2011 AT 6:56 PM

13 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hello,

It sounds like the blower fan went out but to be sure here is a guided to help test it and the air conditioner a d blower motor wing diagrams so you can see how the system works.

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

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Monday, June 20th, 2011 AT 7:45 PM
Tiny
SVJORN
  • MEMBER
  • 5 POSTS
I am talking about the fan inside the car for your heater and a/c to blow inside the car. Maybe you call it a blower instead of a fan. Is there a relay for this fan/blower somewhere?
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Monday, June 20th, 2011 AT 8:03 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
There's no relay involved or blower motor resistor,it uses a blower motor control module instead

Check the HVAC blower fuse if okay-the problem is coming from the blower control module or the HVAC contol module-have it checked

read the guides below on testing wiring and using a test light

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

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

The wiring for the blower motor is attached below
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Monday, June 20th, 2011 AT 9:14 PM
Tiny
SVJORN
  • MEMBER
  • 5 POSTS
I will check that, Thanks for your help!
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Monday, June 20th, 2011 AT 10:14 PM
Tiny
SVJORN
  • MEMBER
  • 5 POSTS
Where is the blower control module and the HVAC module at?
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Tuesday, June 21st, 2011 AT 3:34 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Im sorry at this present moment I cannot enter the GMC Acadia module-sorry again-when available I'll send it asap
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Tuesday, June 21st, 2011 AT 6:33 PM
Tiny
SVJORN
  • MEMBER
  • 5 POSTS
I found it and for now have it going. THanks for your help.
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Tuesday, June 21st, 2011 AT 8:27 PM
Tiny
GMCACADIAOWNER
  • MEMBER
  • 1 POST
Hey svjorn,

I'm having the same problem you had. The blowers won't seem to turn on. I was wondering what you did to fix it.

Thanks for the help!
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Monday, September 26th, 2011 AT 5:34 PM
Tiny
STEVEOG
  • MEMBER
  • 1 POST
Having the same problem. Blower works. Where is the hvac module located? Fuses are good.
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Tuesday, April 19th, 2016 AT 7:43 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hey STEVEOG, found the module for you it looks like it is integrated into the panel itself here is the diagram I found, let me know what you find.
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Tuesday, April 19th, 2016 AT 8:54 AM
Tiny
REY-GTS
  • MEMBER
  • 1 POST
I had this problem is was the blower motor cost me $121.00 for anew one all fixed! I love this site.
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Thursday, September 12th, 2019 AT 12:08 PM
Tiny
2CP-ARCHIVES
  • MEMBER
  • 4,540 POSTS
  • 2008 GMC ACADIA
  • 76,777 MILES
Where r relays in underhood fuse box for a/c? Front fan does not work but back ones are fine. Will changing these help with fan problem
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Thursday, September 12th, 2019 AT 12:09 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It ' in the underhood fuse box and should be clearly marked on undreside of cover. It'sa 40 amp fuse. It could be the module is no good as well or the control.
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Thursday, September 12th, 2019 AT 12:09 PM (Merged)

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