If fan does not work in all speeds, it could be a bad motor.
Heater fan motor is located under the glove box. Give it some banging to test if the motor starts working. If yes, the carbon is running out and motor has to be replaced.
Unplug the wire and use a test lamp to check for presence of battery voltage with ignition switch turned on. One of the wire should have battery voltage.
Sunday, December 5th, 2010 AT 4:23 AM