Grand Cherokee 2WD L6-4.0L VIN S (1997)
Blower Motor: Testing and Inspection
Blower Motor Diagnosis and Testing
WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, REFER TO AIRBAGS SYSTEMS BEFORE ATTEMPTING ANY STEERING
WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE
PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIR-BAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.
BLOWER MOTOR
Possible causes of an inoperative blower motor include:
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Faulty fuse
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Faulty blower motor ground circuit wiring or connectors
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Faulty blower motor resistor (manual temperature control)
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Faulty blower motor power module (ATC)
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Faulty blower motor switch
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Faulty heater-A/C mode control switch
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Faulty blower motor feed circuit wiring or connectors
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Faulty blower motor.
Possible causes of the blower motor not operating in all speeds include:
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Faulty fuse
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Faulty blower motor switch
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Faulty blower motor resistor (manual temperature control)
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Faulty blower motor power module (ATC)
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Faulty high speed blower motor relay (ATC)
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Faulty ATC controller
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Faulty blower motor circuit wiring or connectors.
