RAM 2500 Truck 4WD V8-5.9L VIN Z LDC (1998)
Blower Motor: Description and Operation
Blower Motor
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 the 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 be serviced from the passenger compartment side of the housing.
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 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, and the blower motor resistor.
The blower motor and blower wheel cannot be repaired and, if faulty or damaged, they must be replaced. The blower motor and blower wheel are
each serviced separately.
