The ACheater fan will not come on you've check the fuses and the relay switches they are all find your vehicle in a 2004 Chevrolet Impala?

Answer 1

Put an ohm meter on the two pins that plug into the blower motor....if they read OL or infinity on the meter then your blower motor has an open winding. Keep in mind that there is no motor winding that has a 0 ohm reading unless it is wound with silver or gold windings......and even then that would be doubtful that it would read 0 ohms. Another possibility is that you have an open resistor on the control panel itself. The speed of that motor is controlled by various resistors inline with the motor. So if the fuses are good and the relay is not shorted, then the chances are that you have an open motor winding or a bad resistor pack in the control panel. If the motor winding does not show infinity, start looking at the control panel for a burnt resistor or a cold solder joint( that is a solder joint on a circuit board that appears gray and cracked or a component that feels very loose in the circuit board. For a couple of dollars, you can fix this yourself instead of paying some mechanic hundreds if not thousands of dollars to "impress" you with his technical know how, when in fact he was notified by the factory with a notification of the problem and exactly what causes it!