Blower motor not working?

Tiny
JIMMY CHRISTOPHER
  • MEMBER
  • 1993 CADILLAC ALLANTE
  • 100,000 MILES
Nothing when I activate blower speed. Jumped blower motor direct with battery power and it works. What do I look for fuses are good?
Thursday, August 24th, 2023 AT 12:10 PM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,818 POSTS
It sounds like you have a blown fuse, bad speed resistor or the ground is bad. here is a guide to help you check for power and the blower motor wiring diagrams so you can see how the system works and which fuses and grounds to check:

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

This guide can help as well:

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Check out the images (below). Please let us know what you find.
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Thursday, August 24th, 2023 AT 5:50 PM
Tiny
JIMMY CHRISTOPHER
  • MEMBER
  • 4 POSTS
  • 1993 CADILLAC ALLANTE
  • 100,000 MILES
HVAC blower motor not working. I replaced the blower module it is still not working jumped blower motor 12v works fine. Need location of module relay. If relay turns out to be good could it be the programmer?
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Friday, September 1st, 2023 AT 12:12 PM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 51,818 POSTS
I have seen the programmers go out and cause this problem, here are the location of the components needed to help us fix the problem. I found a better wiring diagram as well, Check out the images (below). Please let us know how it goes.
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Friday, September 1st, 2023 AT 12:15 PM
Tiny
JIMMY CHRISTOPHER
  • MEMBER
  • 4 POSTS
I didn’t see relay location?
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Friday, September 1st, 2023 AT 12:31 PM
Tiny
KEN L
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  • 51,818 POSTS
Looking at the wiring diagrams I don't see a relay for the system?
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Saturday, September 2nd, 2023 AT 10:19 AM
Tiny
JIMMY CHRISTOPHER
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  • 4 POSTS
Okay, thanks for your help.
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Saturday, September 2nd, 2023 AT 12:14 PM

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