Blower Controls

The blower motor is a variable speed motor. The higher the voltage applied to the motor, the faster the motor operates.

Battery voltage to the blower motor is supplied by the heater-A/C control by way of the blower motor relay At low and medium speeds, the voltage supplied from Fuse 4 is stepped down by the blower motor resistors. At high speed, the blower motor relay is energized, removing the blower motor resistor from the circuit. Battery voltage is then applied directly from Fuse 14 to the blower motor through the relay. The motor will then run at maximum speed.