With Air Conditioning

The Rear Auxiliary Heater and Air Conditioning Module is operated by either of two control panels in the overhead console. The front control has the capability to override the rear control settings. The controls select the blower fan's three operating speeds: LO, MED and HI.

The fan speeds are controlled by the selector control and the selected speed blower relay. Battery voltage is supplied from the AC fuse in the underhood fuse-relay center through the CKT 542. Battery voltage is also supplied to each relay through the RR HVAC #5 and the CKT 341. The blower speed control switch grounds the relays distinguish the DK BLU (1926) LO speed, RED (1925) MED speed or the WHT (1924) HI speed wire. The CKT 150 completes the path to ground from the blower speed switch to the rear body ground.

The front and rear control switch panels in the overhead console are both backlit. With the park lamps on, battery voltage is supplied to the lamps by the ILLUM fuse #14 and the CKT 8. Ground is provided by the CKT 150 from the rear body ground. The panel dimmer switch controls the lamp's illumination intensity.