Intrepid V6-3.5L VIN K (2003)
Blower Motor Resistor: Description and Operation
BLOWER MOTOR RESISTOR BLOCK
Vehicles with manual air conditioning (non-ATC) systems will have a blower motor resistor block. The resistor block is mounted to the lower
right side of the HVAC housing in the passenger compartment, where it can be accessed for service.
The blower motor resistor has multiple resistor wires, 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 wire to obtain the selected blower motor speed.
The blower motor resistor cannot be repaired and, if faulty or damaged, it must be replaced.
With the blower motor switch in the lowest speed position the ground path for the motor is applied through all of the resistor wires. Each higher
speed selected with the blower motor switch applies the blower motor ground path through fewer of the resistor wires, increasing the blower motor
speed. When the blower motor switch is in the highest speed position, the blower motor resistor is bypassed and the blower motor receives a direct
path to ground.
