When fan is supposed to work, use something to knock lightly at the motor and if it starts working, that would mean it is failing and should be repaired.
If you have a test light or DVOM, disconnect the fan wire connector and test for battery voltage at one of the terminals of the wireharness.
You can apply battery voltage to one terminal of the fan motor and ground the other terminal. If the fan works, it is not a motor fault.
Monday, August 19th, 2013 AT 10:09 AM