A/C not working

2005 CHEVROLET EQUINOX
120,000 MILES • V6 • 4WD • AUTOMATIC
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JEREMYRBY1
  • MEMBER
  • 2 POSTS
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.
Oct 25, 2020 at 3:33 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 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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Oct 25, 2020 at 3:47 PM
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JEREMYRBY1
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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?
Oct 25, 2020 at 3:54 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 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
Oct 25, 2020 at 3:59 PM
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