Blower Motor: Description and Operation

When the ignition switch is in the RUN position it connects circuit A1 from fuse 4 in the Power Distribution Center (PDC) to circuit A22. Circuit A22 supplies battery voltage to fuse 12 in the fuse block. Fuse 12 powers circuit C1.

Circuit C1 supplies battery voltage to the A/C blower switch. In the LOW position, the A/C blower switch supplies voltage to the low speed brush of the blower motor. In the MEDIUM position, the switch supplies voltage to the medium speed bush of the blower motor. In the HIGH position, the switch supplies voltage to the high speed brush of the blower motor.

The blower motor has a field jumper. The ground circuit for the blower motor connects to the cigar lighter. Circuit Z1 provides ground for the blower motor and the cigar lighter.