The blower motor does not work but my compressor clicks on?

BENARD MILLER

MEMBER
2004 CHEVROLET MONTE CARLO
3.8L
6 CYL
2WD
AUTOMATIC
148,000 MILES

I replaced the blower motor, resistor, ignition and control module. All fuses and relay are good. No power to my resistor.

Monday, September 5th, 2022 AT 8:10 PM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,512 POSTS

We need to check for power using a test light for the fuse (HVAC Blower 30 amp), in the under-hood fuse panel, this guide can help and the fuse location in the diagrams below, also I have included HVAC wiring diagrams so you can see how the system works.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Please let us know what happens.

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Tuesday, September 6th, 2022 AT 10:05 AM

BENARD MILLER

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3 POSTS

I already used the test light every fuse and relay lit up fine using the test light.

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Tuesday, September 6th, 2022 AT 11:57 AM

KEN L

MASTER CERTIFIED MECHANIC
47,512 POSTS

Okay, can you test for power at the red wire at the resistor? If you look at the wiring diagrams you can see that it is a straight shot from the fuse to the blower motor resistor.

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Wednesday, September 7th, 2022 AT 12:10 PM

BENARD MILLER

MEMBER
3 POSTS

I already tested the red wire entering the resistor and there's no power. The HVAC blower 30 amp is good I checked it with a test light and that's what's puzzling me.

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Thursday, September 8th, 2022 AT 8:07 AM

KEN L

MASTER CERTIFIED MECHANIC
47,512 POSTS

You can see from the wiring diagrams it is a straight shot from the fuse to the power of the resistor, I would run a new power wire to the resistor. Let me know.