Blower motor not working?

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

KEN L

MASTER CERTIFIED MECHANIC
47,643 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

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)

KEN L

MASTER CERTIFIED MECHANIC
47,643 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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