Challenger V6-3.5L (2009)
Blower Motor: Testing and Inspection
BLOWER MOTOR
WARNING: Disable the airbag system before attempting any steering wheel, steering column or instrument panel component diagnosis or
service. Disconnect and isolate the negative battery (ground) cable and wait two minutes for the airbag system capacitor to
discharge before performing further diagnosis or service. This is the only sure way to disable the airbag system. Failure to follow
these instructions may result in accidental airbag deployment and possible serious or fatal injury.
NOTE: See Wiring Information for circuit descriptions and diagrams.
OPERATION
Possible causes of an inoperative blower motor include:
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Open fuse
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Inoperative blower motor resistor
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Inoperative blower motor switch
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Inoperative mode control switch
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Inoperative blower motor
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Inoperative blower motor circuit wiring or wire harness connectors
NOISE
To determine if the blower motor is the source of the noise, simply switch the blower motor from Off to On. To verify that the blower motor 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 on fresh air inlet screen
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Foreign material in blower wheel
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Foreign material in the HVAC housing
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Improper blower motor mounting
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Deformed or damaged blower wheel
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Worn blower motor bearings or brushes
VIBRATION
Possible causes of blower motor vibration include:
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Improper blower motor mounting
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Foreign material in blower wheel
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Deformed or damaged blower wheel
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Worn blower motor bearings
