Radiator cooling fans not working

1994 BUICK PARK AVENUE
150,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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CHRIS MCCRAY
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  • 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
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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
Jul 11, 2020 at 11:52 AM
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CHRIS MCCRAY
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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
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You are welcome.

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

Roy
Jul 11, 2020 at 12:17 PM