Dakota Quad Cab 2WD V8-5.9L VIN Z LDC (2002)
Blower Motor Resistor: Description and Operation
BLOWER MOTOR RESISTOR BLOCK
The blower motor resistor is mounted to the HVAC unit inside the passenger compartment. It can be accessed from the passenger foot well area. See
Blower Motor Resistor in the Removal and Installation for more information.
The resistor has multiple resistor circuits each of which will change the resistance in the blower motor ground path to change the blower motor speed.
The blower motor switch directs the ground path through the correct resistor circuit to obtain the selected blower motor speed.
With the blower motor switch in the lowest speed position, the ground path for the motor is applied through all of the resistor circuits. Each higher
speed selected with the blower motor switch applies the blower motor ground path through fewer of the resistor circuits, increasing the blower motor
speed.
The blower motor resistor cannot be repaired and, if faulty or damaged, it must be replaced.
