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Radiator cooling fans not working

Tiny
CHRIS MCCRAY
  • MEMBER
  • 1994 BUICK PARK AVENUE
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Hello. I have the car listed above 3800 v6. Cooling fans are not coming on unless I have A/C running. Any thoughts? Thanks, Chris.
Saturday, July 11th, 2020 AT 11:42 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

Do you have a test light to do some testing?

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

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

I attached a wiring diagram for you to view and need to do some checks.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

One thing you can try is disconnect the coolant sensor by the thermostat and see if the fans kick on. Do this with the key on, engine off.

Roy
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Saturday, July 11th, 2020 AT 11:52 AM
Tiny
CHRIS MCCRAY
  • MEMBER
  • 2 POSTS
Yes, I have a test light. Will test both relays when I get home. Thank you!
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Saturday, July 11th, 2020 AT 12:15 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Keep me updated and let me know if you need any other help.

Roy
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Saturday, July 11th, 2020 AT 12:17 PM

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