Rear Auxiliary Heater Blower Controls

The Blower Motor delivers air to the rear interior of the vehicle. Its speed is controlled by the Blower Switch and the Blower Resistors. Note that the Blower Switch provides ground to the Blower Resistors rather than battery voltage as in most common systems. When the Ignition Switch is in RUN, battery voltage is supplied to the Blower Motor. With the Blower Switch in LO, voltage is supplied across both Blower Resistors and the Blower Motor. The Blower Motor runs at its slowest speed. With the Blower Switch in MED, one of the Blower Resistors is bypassed and the Blower Motor runs faster. When the Blower Switch is set to HI, direct ground is provided to the Blower Motor and the Blower Motor runs at its fastest speed.