Rear

CONTROLS - REAR

Fig.1 Rear Blower Motor Wheel/Resistor:

BLOWER MOTOR RESISTOR BLOCK
The blower motor resistor for the optional rear A/C unit is located within the unit housing. The 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 located in the A/C control head directs the ground path through the correct resistor wire 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 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.

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

REAR HVAC CONTROL
The optional rear heater-A/C unit blower motor is controlled by a four position rotary-type blower motor switch, mounted by a snap fit in a bracket in the headliner over the right front seat back. The switch allows the selection of one of three blower motor speeds and an OFF position when the front control is set to rear unit operation otherwise the front unit controls both front and rear operation. The blower motor switch directs the blower motor ground path through the blower motor resistor.

The blower motor switch cannot be repaired and, if faulty or damaged, the entire switch unit must be replaced. The blower motor switch has a replaceable incandescent-type illumination lamp bulb.