Cooling fan not working properly

Tiny
WILLIAMDA
  • MEMBER
  • 1996 TOYOTA COROLLA
  • 1.6L
  • 4 CYL
  • 2WD
  • MANUAL
  • 200,000 MILES
Cooling fan runs as soon as you start the car cold.
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Tuesday, September 14th, 2021 AT 10:58 AM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

If the A/C is turned on, the condenser fan will be on, so check to make sure the AC or defroster isn't turned on.

Next, either there is a short to power, a bad relay, or a faulty temp sensor. First, I want you to remove one relay at a time to see which one causes the fan to turn off. If none turn it off, we have a short to power after the relay.

I attached the wiring schematic below. I highlighted three relays to be checked. The last two pics show the relay locations in the boxes. If you find the fan does turn off, the relay could be bad, Here is a link that explains how to test one:

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

Also, here is a link you may find helpful as well:

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

Let me know what you find or if you have other questions.

Take care,

Joe

See pics below.
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Tuesday, September 14th, 2021 AT 8:29 PM

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