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Auxiliary fan not working

Tiny
MARKO1974
  • MEMBER
  • 1991 JEEP CHEROKEE
  • 4.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
My vehicle has a fan operated by the engine and pulleys but there is also an auxiliary fan and that is not coming on. Sometimes the temperature gets above normal so I went to AutoZone to see if they list a cooling fan switch or sensor and no they do not list one. So I am wondering where else to look. Is there a relay or something else to look for? If so what is its location? Thanks for your help.
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Sunday, November 4th, 2018 AT 1:46 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

It sounds like the relay is bad or the fan is bad. Here is a guide to help you run some test and the fan wiring diagrams so you can see how the system work with the relay location:

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

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken

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Monday, November 5th, 2018 AT 4:25 PM

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