Radiator fan stopped working?

Tiny
JULIE COX
  • MEMBER
  • 1990 OLDSMOBILE CIERA
  • 3.3L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 120,000 MILES
My fan quit working on my car and we've changed the thermostat, we've changed the relay, and no fuses seem to be blown. If you put power directly to the fan it goes, it runs. So also my radio and the high on the controller for the fan inside the car has quit working so are they all related or no so.
Saturday, September 9th, 2023 AT 1:04 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,867 POSTS
Hi Julie, I attached a wiring schematic below of the radiator cooling fan circuit. At this point, I see no relationship between the radiator cooling fan and radio and the blower motor.

When you checked fuses, did you make sure there is power to and from them? In the interior fuse box at the right side of the instrument panel is a fan fuse for the cooling fan. Check to see if that fuse has power to and from it with the ignition key in the run position.,

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

If that checks good, then we need to access the fan relay located at the right front of the engine compartment.

Once you have located it, remove the relay. With the ignition key off, probe each connector pin using a test light. One should have power at all times. If you find power, turn the key to the run position. Then you should find two pins with power. Let me know what you find.

Here is a link you may find helpful; it explains how a relay circuit works and how to test them:

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

Take care,

Joe

See pics below. Pic 2 shows the fan relay location.
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Sunday, September 10th, 2023 AT 8:13 PM

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