Radiator cooling fans not working

1994 BUICK PARK AVENUE
150,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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CHRIS MCCRAY
  • MEMBER
  • 2 POSTS
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.
Jul 11, 2020 at 11:42 AM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 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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Jul 11, 2020 at 11:52 AM
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CHRIS MCCRAY
  • MEMBER
  • 2 POSTS
Yes, i have a test light. Will test both relays when I get home. Thank you!
Jul 11, 2020 at 12:15 PM
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ASEMASTER6371
  • CAR REPAIR CONTRIBUTOR
  • 52,796 POSTS
You are welcome.

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

Roy
Jul 11, 2020 at 12:17 PM