Temperature Cable; Hi Blower Relay; Resistor Block; And Ambient Switch; Heater Core And Case Installation; Control Panel .1A-34 - Pontiac Grand Prix Service Manual

1A-34
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PONTIAC SERVICE MANUAL
DUCT EXTENSION
FIREBIRD O N L Y
Fig. 1A-51 Typical
-
Heater Core and Case
Installation
15. Replace by reversing the above procedure and plug
hole in fender skirt using a one inch plastic plug.
ALL-REMOVE AND REPLACE
1. Remove glove compartment on all except Grand
Prix.
2. Scribe alignment marks on case for cam placement.
3. Remove control cable.
4. Remove cam hold down screws.
5.
Remove cam.
6. To replace reverse removal procedure.
7. Adjust cable.
TEMPERATURE CABLE
ALL
-
REMOVE AND REPLACE
1. Remove cold air duct.
2.
Remove glove compartment and disconnect cable at
heater case (Fig. 1A-52, 53, 54 and 55).
3. Disconnect cable at control panel.
models it will be necessary to remove radio for this
operation.
4. To replace reverse removal procedure.
ALL TEMPERATURE CABLE ADJUST
Temperature cables on all standard air conditioned
models are Bowden type with an adjusting turnbuckle.
Rotating the turnbuckle in one direction extends the
outer sleeve and rotating in the other direction
shortens the sleeve. Adjustment procedures are listed
for Pontiac, Tempest, Firebird and Grand Prix models
on Figs. 1A-52, 53,54 and 55 respectively.
CONTROL PANEL
Control panels used on all models are of the slide lever
design. The select lever provides the mode of opera-
tion. The temperature lever moves the temperature
door to control incoming air temperature. The blower
lever controls blower speed. The vent lever controls
compressor operation and will turn on the compressor
whenever the select lever is moved. The lever may
then m be moved to vent to turn off the compressor.
Serviceable items include the rotary vacuum valve,
water control valve, master switch, blower switch,
.
compressor switch and panel face.
ALL
-
REMOVE AND REPLACE
1. Remove lower duct and outlet assembly.
4
2. Remove radio.
3. Remove wire and vacuum connections.
NOTE: Identlfi wire connectors to switches and vacuum
connectors for correct reassembly and remove.
4. Remove control panel retaining screws (nuts on
Tempest).
5. Lower control panel assembly.
6. Remove temperature control cable and remove
control.
To service components of the control panel see Figs.
1A-56, 57, 58 and 59 for Pontiac, Tempest, Firebird
and Grand Prix models respectively.
HI BLOWER RELAY; RESISTOR BLOCK;
AND AMBIENT SWITCH
ALL
-
REMOVE AND REPLACE
Fig. 1A-60 shows the location of the relay, resistor
block and ambient switch. All three items are retained
by two (2) screws.
The ambient switch should open ,when ambient
temperature lowers to approximately 32°F which
would shut off the compressor. Resistance values, in
ohms, are shown on the A/C wiring schematic at the
end of this section for each model.