Rear

Rear Blower Motor Resistor:

A rear blower motor resistor is used on vehicles equipped with the manual temperature control (MTC) heating-A/C system. Vehicles equipped with the automatic temperature control (ATC) heating-A/C system use a rear blower motor power module, instead of the rear blower motor resistor.

The rear blower motor resistor is mounted to the rear HVAC housing, directly above the A/C expansion valve. The rear blower motor resistor consists of a molded plastic mounting plate with an integral connector receptacle. Concealed behind the mounting plate is an electrical circuit board with two resistors and a thermal fuse.

The rear blower motor resistor is accessed for service by removing the right quarter and D-pillar trim panels.

The rear blower motor resistor is connected to the vehicle electrical system through a dedicated take out and connector of the rear HVAC wire harness. The rear blower motor resistor has an electrical circuit board with two resistors, each of which will reduce the current flow through the rear blower motor to change the blower motor speed.

The blower motor switch in the manual temperature control system directs the ground path for the rear blower motor through the correct resistor to obtain the selected speed. With the blower motor switch in the lowest speed position, the ground path for the motor is applied through both resistors. Each higher speed selected with the blower motor switch applies the blower motor ground path through fewer of the resistors, increasing the blower motor speed. When the blower motor switch is in the highest speed position, the blower motor resistors are bypassed and the blower motor receives a direct path to ground through the blower motor switch.

The rear blower motor resistor cannot be adjusted or repaired and, if faulty or damaged, it must be replaced.