1977 B Series C60 A/C Vacuum Diagram - Pontiac TRANS AM 1977 Service Manual

MAXIMUM AIR MODE NORMAL MODE BI-LEVEL MODE
OFF MODE
EVAPORATOR CORE
HEATER CORE
1
-
BLOWER MOTOR
UPPER & LOWER
\
1-
DIVERTER VALVES AIR INLET VALVE
(MODE DOORS) (RECIRC. DOOR)
TEMP. V ~ V E (DOOR)
HEAT MODE ( I
( - 9
DEFROST
NOTE: PORT 3 HAS VACUUM
FROM PORT 7 I N ANY MODE
WHEN TEMP. LEVER IS SET
AT FULL COLD
VENT MODE DEFROST MODE
5 W 7