RAM 1500 Truck 4WD V8-5.2L VIN Y (1997)
Blower Motor: Testing and Inspection
POSSIBLE CAUSES
Possible causes of an inoperative blower motor include:
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Faulty fuse
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Faulty blower motor relay
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Faulty blower motor battery feed circuit
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Faulty blower motor ground circuit
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Faulty blower motor resistor
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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.
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 relay
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Faulty blower motor battery feed circuit
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Faulty blower motor resistor
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Faulty blower motor switch.
Vibration
Possible causes of blower motor vibration include:
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Improper blower motor mounting
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Improper blower wheel mounting
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Blower wheel out of balance or bent
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Blower motor faulty
Noise
To verify that the blower is the source of the noise, unplug the blower motor wire harness connector and operate the heater-A/C system. If the
noise goes away possible causes include:
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Foreign material in the heater-A/C housing
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Improper blower motor mounting
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Improper blower wheel mounting
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Blower motor faulty