Cooling and AC problem

Tiny
JAYVILLA0917
  • MEMBER
  • 2008 CHEVROLET IMPALA
  • 3.5L
  • V6
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Fans not working. I have checked fuses and relays and all checked good. I pulled fans and gave direct power and both work fine. AC fan plug keeps a constant 12 volts. Radiator fan plug no power. What should I do? If I am not mistaking AC kicks on while I am driving the vehicle.
Sunday, August 12th, 2018 AT 5:26 PM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,796 POSTS
Good evening.

I attached a wiring diagram for you to view.

Check all three fuses listed for power on both sides with the key on.

The fans are controlled by the PCM based on AC switches input and the coolant sensor for the cooling system.

Try removing the wire connector from the coolant sensor with the key on and see if the cooling fans come on.

Roy
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Sunday, August 12th, 2018 AT 5:41 PM

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