Grand Cherokee 4WD L6-242 4.0L VIN S MFI (1993)
Blower Motor: Flow of Diagnosis
Blower Motor Noise and Vibration Diagnosis
Blower Motor Noise/Vibration Diagnosis
The blower resistor 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 (Hot). Do not operate the blower motor with the resistor block removed from the heater-A/C
unit.