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Cooling fan not activated when above "normal" temperature?

Tiny
MARKOSSINGER
  • MEMBER
  • 1997 FORD MUSTANG
  • 4.6L
  • V8
  • 2WD
  • MANUAL
  • 125,000 MILES
The engine cooling fan does not activate once the engine temperature is above "normal" or center of the gauge range. New CCRM and Temp sensor. If temperature sensor unplugged, with engine running, the fan will operate at High speed. Turning A/C on does nothing as far as activating the fan.
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Tuesday, July 12th, 2022 AT 3:51 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,648 POSTS
We need to check the connections at the CCRM. Here is a guide to help check the power, grounds and connections. Make sure you are getting power from the PCM relay. I have included the wiring diagrams for the fan motor in the images below.

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

Also, we can run the codes to see what comes up.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (below). Please let us know what happens.
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Wednesday, July 13th, 2022 AT 11:24 AM

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