Blower Motor Noise and Vibration Diagnosis

Blower Motor Noise/Vibration Diagnosis:

The resistor block supplies the blower motor with varied voltage (low and middle speeds) or battery voltage (high speed).

CAUTION: Blower motor resistor block can be very hot, use caution when working on or near it. Do not operate the blower motor with the resistor block removed from the heater-A/C housing.

Refer to the Blower Motor Vioration/Noise chart for diagnosis.