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1 C-2
1 9 7 7 PONTIAC SERVICE MANUAL
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T O I M O I M I
D U C K
VACUUM M U R C I
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Fig. 1 C-3 A and G Series Vacuum Diagram
6. Slide the temperature lever from the 65 ref. setting to
85 ref. (far left to far right). Note the lever effort requirements
above.
The air temperature from the heater outlet should rise
a noticeable amount, although it will not go over 115" F.
(46°C.). Blower speed should still be HI.
7. Slide the mode lever to DEFROST
Air exits mainly from the defroster nozzle with some
air from the heater outlet. The compressor comes "on" and
may cycle off-and-on. Air temperature should be about
100°F. (37°C.) to 115°F. (46°C.). Blower speed should still be
HI.
8. Move the blower switch to LO, pausing at each of the
two intermediate positions.
Blower speed and air flow should decrease as the
switch lever is moved down through each position.
9. Slide the mode lever to MAX.
Blower comes on HI speed. Air exits from the A/C
outlets only. Air noise is heard from the right front corner
of the passenger compartment as the system goes on "inside"
air. The compressor comes "on" and may cycle off-and-on.
Air temperature should be about 60°F. (16°C.) at the A/C
outlets.
ON-CAR SERVICE PROCEDURE
C65 PROGRAMMER TEMPERATURE
CABLE ADJUSTMENT
Set and hold A/C Control temperature lever at the 75
reference point.
Index holes in programmer control lever and
programmer chassis should now be in alignment (see Fig.
1C-5).
If holes do not align, check and correct cable routing
if necessary.
Make sure compensator link attaching nut is secure.
If proper alignment is not found, bend programmer
control lever with a screwdriver in provided slot to align holes
(Fig. 1C-5).
C65 PROGRAMMER "REMOVAL-
REPLACEMENT-ADJUSTMENT"
PROCEDURE
Remove glove compartment.
Remove hush panel.
Disconnect temperature cable, temperature door
threaded operating rod, vacuum harness and sensor hose at
programmer.
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