A/C not working

JEREMYRBY1

MEMBER
2005 CHEVROLET EQUINOX
V6
4WD
AUTOMATIC
120,000 MILES

I've changed the blower fan, resister, control knob and switch, checked the fuses and switched out relays. Still can't get A/C to work. If you run a ground from the purple wire going to the blower motor it kicks on.

Sunday, October 25th, 2020 AT 3:33 PM

3 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

Good afternoon,

I would check for power to the blower resistor at the purple wire. See if you have battery voltage there.

If you have power then it could be a bad resistor even though it is new.

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

Roy

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Sunday, October 25th, 2020 AT 3:47 PM

JEREMYRBY1

MEMBER
2 POSTS

What's your take on the purple ground wire being spliced? When I run a wire from the spliced purple wire going to blower motor to the chassis it starts working great? Without out that wire nothing works. I can't test it currently. But I will. If that's bad will the blower completely stop?

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Sunday, October 25th, 2020 AT 3:54 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

The purple is the ground for the system. Power is provided to the blower motor from the other wire. The ground goes through the motor, blower resistor and to ground.

Roy

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Sunday, October 25th, 2020 AT 3:59 PM