Blower Motor Vibration and/or Noise Diagnosis Test

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

CAUTION: Stay clear of the blower motor and resistor block (Hot). Do not operate the blower motor with the resistor block removed from the heater-A/C housing.

Blower Motor Noise/Vibration Diagnosis:

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