Mechanics

RADIATOR COOLING FANS NOT WORKING

1999 Pontiac Grand Am • 170,000 miles

Cooling fan operation 1999 Pontiac Grand Am V6 3.4 L engine. I would like to know how are the radiator cooling fans supposed to work. What temp are the supposed to come on and what speed (low, high) etc. Any Info is greatly appreciated. Thanks.
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Gabe1
November 30, 2011.




When the engine reaches a certain temp (based on the temp sensor), the sensor send a signal to the PCM which sends power to the fan relay. THe relay then powers the motor.

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Tiny
Rasmataz
Nov 30, 2011.

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