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Old 03-27-2002, 10:44 AM
Arthur Dalton Arthur Dalton is offline
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Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,784
The aux fan for the a/c circuit has nothing to do with the sensor on the engine. It is not temp sensed, it is pressure sensed [ high side freon pressure]
It is located in the high side line near the drier/reciever. Jumper these will run low fan when a/c is on.
The high speed aux fan is temp sensed and is a thermistor circuit. When the sensor gets to the proper resistance [ temp], it triggers the relay circuit for high speed fan. These two fan operations are independent of one another.
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