Blower Controls

The blower motor is controlled by the heater control panel. With the ignition switch in RUN, the heater control panel receives battery voltage through fuse 19. The heater control panel is grounded at G303.


Battery voltage is supplied through fuse 37 to the [1][2]blower motor relay contacts at all times. With the ignition switch in RUN, the blower motor relay is energized and battery voltage is supplied to the blower motor. The power transistor controls the blower motor in all speeds except HIGH. The power transistor is controlled by the heater control panel. When you turn the blower switch to its highest speed, the heater control panel grounds the blower motor high relay coil. This energizes the relay, connecting the blower motor directly to ground, and the blower runs at high speed.