Pontiac FIREBIRD 1972 Service Manual page 174

CUSTOM AIR CONDITIONING 1A-115
DEFROSTER NOZZLE
Fig. 1A-138 X Series A/C In-Car Wiring
3. Disconnect harness from in-car wire harness (Fig.
1A-137).
4. Remove grommet and feed harness through dash
opening into engine compartment.
5. Disconnect harness connections at blower motor,
blower resistor, ambient switch, high blower relay
and compressor wire harness (Fig. 1A-141).
6. Release harness from clips and remove harness.
7. To replace, reverse removal procedure.
A/C COMPRESSOR WIRE HARNESS
REMOVE AND REPLACE
For removal of the compressor A/C wire harness, refer to
Figs. 1A-142 (V-8 engines except X Series with 307 en-
gine) and 1A-142A (X Series with 307 engine) for harness
routing and electrical connections.
A/C AMBIENT SWITCH WlRE HARNESS
REMOVE AND REPLACE
-
B
SERIES
1. Remove RH headlamp filler panel support bracket
screws to allow support bracket to be positioned for
disconnecting ambient switch connector.
2. Disconnect harness at ambient switch and feed wire
harness through radiator support (Fig. 1A-143).
3. Release wire harness from retaining clips.
4. Disconnect harness from main A/C electrical har-
ness at evaporator case and remove harness.
5. To replace, reverse removal procedure.
A/C (MAIN) COLD AIR DUCT
1. Disconnect battery.
2. Remove instrument panel lower trim plate.
3. Remove instrument panel upper trim plate (includes
removal of radio knobs and bezels).
4. Remove glove box, disconnect radio connectors and
antenna lead and remove radio.