Operation CHARM: Car repair manuals for everyone.

Auxiliary High Blower Speed

When the High blower speed is selected, the heater auxiliary and/or A/C auxiliary blower motor switch applies voltage to the heater auxiliary and/or A/C auxiliary blower motor resistor through the auxiliary blower motor high speed control circuit. Voltage is sent directly to the auxiliary blower motor to achieve the desired blower speed. The auxiliary blower motor is included in the series circuit by the auxiliary blower motor supply voltage and ground circuits.