Testing temp switch for aux fan

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03-31-2011, 08:03 PM

benh088

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Year: 1991

Model: Cherokee

Engine: 4.0L Inline 6 High Output

Testing temp switch for aux fan

Hey guys, how do you test the temperature switch mounted on the thermostat housing on a 91 XJ? The auxiliary fan comes on with the AC but I've never heard it come on during hot days in heavy traffic, etc.

Thanks!

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03-31-2011, 08:06 PM

93gc40

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Year: 1996

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I'd use a multi Meter.....

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03-31-2011, 08:37 PM

benh088

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Year: 1991

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Quote:

Originally Posted by 93gc40

I'd use a multi Meter.....

It'd work if I just contact the leads on the multimeter to the leads on the sensor while it's plugged in and my Jeep is running? I thought it worked differently.

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