Toyota
Dodge Durango
 Service Manual
Heating and Air Conditioning » Description and operation
Blower motor

FRONT

DESCRIPTION

The blower motor and blower wheel are located in the passenger side end of the heater-A/C housing, below the glove box. The blower motor controls the velocity of air flowing through the heater-A/C housing by spinning a squirrel cage-type blower wheel within the housing at the selected speed. The blower motor and blower wheel can only be serviced with the heater-A/C housing removed from the passenger compartment.

OPERATION

The blower motor will only operate when the ignition switch is in the On position, and the heater-A/C mode control switch knob is in any position, except Off. The blower motor receives a fused battery feed through the blower motor relay (Voltage Reduction Relay or VRR) whenever the ignition switch is in the On position.

The blower motor battery feed circuit is protected by a fuse in the Power Distribution Center (PDC).

The blower motor relay control circuit is protected by a fuse in the junction block. Blower motor speed is controlled by regulating the ground path through the heater-A/C mode control switch, the blower motor switch, the blower motor resistor, the blower motor relay (VRR), and the high speed blower motor relay.

The blower motor and blower motor wheel cannot be repaired and, if faulty or damaged, they must be replaced. The blower motor and blower wheel are each serviced separately.

REAR

DESCRIPTION

The rear blower motor and blower wheel are mounted to a blower wheel housing located inside the rear overhead A/C unit, above the headliner. The blower motor controls the velocity of air flowing through the overhead A/C unit by spinning a wide squirrel cage-type blower wheel within the housing at the selected speed. Rear blower motor speed is controlled by regulating the ground path through the rear blower motor switch and the rear blower motor resistor.

OPERATION

The rear blower motor will only operate when the ignition switch is in the On position. The rear blower motor receives a fused battery feed through a fuse in the relay and fuse block whenever the ignition switch is in the On position. The relay and fuse block is attached to the back of the junction block, under the left side of the instrument panel in the passenger compartment.

The rear blower motor, blower wheel, and blower wheel housing cannot be repaired and, if faulty or damaged, they must be replaced as a complete factory- balanced unit.

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    Dodge Durango Service Manual / Heating and Air Conditioning / Description and operation / Blower motor

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