A/C-Heater

NOTE: The following information is intended to be used in conjunction with the electrical diagrams.

CIRCUIT OPERATION
Several fuses supply power for the air conditioning/ heater system. Fuse B from the Power Distribution Center (PDC) supplies battery voltage on circuit C26 to the contact sides of the A/C compressor clutch relay and radiator fan relay Circuit C26 is HOT at all times.

In the START or RUN positions, the ignition switch connects circuit Al from fuse C in the PDC to circuit A21. Circuit A21 feeds the coil side of the radiator fan relay and fuse 16 in the fuse block.

In the RUN position only, the ignition switch connects circuit A2 from fuse E in the PDC to circuit A22. Circuit A22 supplies voltage to a bus bar in the fuse block. Fuse 1 connects to bus bar and protects circuit C1 which feeds the blower motor.

Circuit E2 from fuse 13 in the fuse block powers the illumination lamps in the A/C heater control switch.