Vacuum Tank; Blower Motor R Elay; Fuse - Chevrolet 1980 Light Duty Truck Service Manual

UPPER CENTER DISTRIBUTOR DUCT
LEFT DISTRIBUTOR DUCT AND
FOOT COOLER
R e p la c e m e n t
1. Disconnect the battery ground cable.
2. Remove the instrument panel bezel.
3. Remove the control to instrument panel screws and
allow control to rest on top of the radio.
4. Remove the switch to control screws, disconnect the
electrical harness (and vacuum harness on master switch)
at the switch and remove the switch assembly.
5. To install a new switch, reverse Steps 1-4 above.
V A C U U M TANK
The vacuum tank is mounted to the engine side of the
dash panel above the blower assembly (fig. IB-33).
R e p lacem en t
1. Disconnect the vacuum lines at the tank.
2. Remove the tank to dash panel screws and remove
the tank.
3. To install, reverse Steps 1 and 2 above.
BLOWER MOTOR RESISTOR
The blower motor resistor is located in the blower side
of the blower-evaporator case (fig. IB-35).
Fig. 1B-30~Air Selector and Ducts (C-K Series)
R e p la ce m e n t
remove the resistor.
attaching screws.
BLOWER MO TO R RELAY - ALL
of the blower-evaporator case (fig. 35).
R e p la ce m e n t
remove the relay.
mounting screws.

FUSE

the entire air conditioning system except for the blower
circuit, the fuse for the blower circuit is located in the
electrical wiring between the junction block and the blower
relay.
AIR C O N D ITIO N IN G
RIGHT HAND OUTLETS
LOWER CENTER DISTRIBUTOR DUCT
1. Disconnect the wiring harness at the resistor.
2. Remove the resistor to case attaching screws and
3. Place the new resistor in position and install the
4. Connect the resistor wiring harness.
The blower motor relay is located on the blower side
1. Disconnect the wiring harness at the relay.
2. Remove the relay to case attaching screws and
3. Place the new relay in position and drive the
4. Connect the relay wiring harness.
A 25 amp fuse, located in the junction block protects
IB -3 7