Pontiac FIREBIRD 1972 Service Manual page 36

HEATING AND VENTILATION 1-15
AIR-DEFROST CABLE
3. On A and F Series, remove radio.
1. Place air control lever in the OFF position.
4. Remove nut retaining cable wire to pin on control
panel.
2. While holding control lever in the OFF position, ad-
just cable turnbuckle (Fig. 1-13) until door seats and
air control lever is forced to start to move.
5. Remove screw retaining cable to control and remove
cable.
3. Move lever to DEFROST position then back to OFF.
Door should be heard hitting its seat.
6. To replace cable, reverse removal procedure. Route
cable smoothly, check operation and adjust if neces-
sary. See Figs. 1- 1 1, 1
-
12 and 1
-
13 for G, A and F
Series respectively.
4. If door does not seat or if lever is more than 1/8"
away from end of slot, repeat steps 2 and 3 until c a w
is properly adjusted.
AIR CONTROL CABLE
-
A SERIES
X SERIES
1. Remove radio.
ALL CABLES
2. Remove retaining screw and disconnect cable from
heater case.
Unlike other Pontiac models, the X Series heater cables do
not have adjustable turnbuckles. Cable adjustment on the
X Series is in the positioning of the cable attaching bracket
at the heater case. Refer to Figs. 1- 14 and 1
-
15 for cable
routing and attachment.
3. Remove nut and screw retaining cable to control
panel and remove cable.
4. To replace cable, reverse removal procedure. Route
cable smoothly, check operation and adjust if neces-
sary, see Fig. 1-12.
1. Connect cable at heater control.
2. Set control lever to the closed (full up) position.
3. Move corresponding heater case door to the off (full
closed) position.
DEFROST CABLE
-
A SERIES
4. Attach cable wire to heater case door lever and
tighten cable attaching bracket screws.
1. Remove radio.
5. Check for proper cable operation.
2. Remove retaining screw and disconnect cable from
heater case.
HEATER CABLE REPLACEMENT
ALL CABLES
-
B SERIES
3. Remove nut and screw retaining cable to control
panel and remove cable.
4. To replace, reverse removal procedure, see Fig. 1
-
12.
1. Perform steps 1 thru 5 of heater control panel re-
placement procedure.
2. Remove retaining screw and nut at control panel and
remove cable.
AIR-DEFROST CABLE
-
F SERIES
3. To replace, reverse removal procedure. Check cable
operation and adjust if necessary.
1. Remove retaining nut and screw and disconnect ca-
ble from heater case (Fig. 1
-
13).
2.
Remove lower instrument panel trim (at steering col-
umn).
3. Remove upper instrument panel trim (at cluster).
TEMPERATURE CABLE
-
A, G and F SERIES
1. On F Series, remove glove compartment and door.
2. Remove retaining screw and disconnect cable from
top of heater case.
4. Remove rally (fuel, volts) cluster if equipped with
rally gages.