Chevrolet 10 1971 Series Chassis Service Manual page 22

HEATER AND AIR CONDITIONING 1A-4
6. Connect the heater hoses to the core tubes (the hose
from the water pump or radiator attaches to the
upper core tube).
7. Connect the motor wire and battery ground cable.
8. Refill the Cooling System.
AIR DISTRIBUTOR DUCT ASSEMBLY
Figure 5 illustrates air distributor duct installation.
DEFROSTER DUCT
The defroster hose and outlet assemblies are illus­
trated in Figure 6.
£
DEFROST-
FAN SWITCH
Fig. 7 — Heater Control
DEFROSTER
CABLE
AIR
CABLE
AIR
TEMP
CONTROL ASSEMBLY
Removal (Fig. 7)
1. Remove the control assembly retaining screws at the
lower edge of the dash.
2. Lower the unit and remove the blower switch.
3. Remove the cables from the control unit one by one
and mount them in their respective positions on the
replacement unit. Check cable adjustment.
Installation
1. Attach the blower switch and wiring to the control
unit.
2. Place the unit in position in the dash and replace
mounting screws.
CONTROL CABLES
Remove the control assembly as outlined under CON­
TROL ASSEMBLY and replace the affected cable or
cables. Check cable adjustment before installing control.
BLOWER SWITCH
Replacement (Fig. 7)
1. Disconnect the battery ground cable.
2. Disconnect the blower
connector.
3. Remove the blower switch attaching screws and re­
move the switch.
4. To install, reverse steps 1-3 above.
Be sure the switch arm plastic bushing
NOTE:
is in place and that the arm is installed in the
slot provided in the air-fan lever.
RESISTOR UNIT
Removal (Fig. 8)
1. Remove glove box assembly.
2. Unplug harness connector from resistor unit. Re­
move the unit attaching screws and remove unit.
Installation
1. Place resistor unit in distributor duct and drive in
attaching screws. Connect harness connector to unit.
2. Install glove box assembly.
s w i t c h wiring harness
10-30 CHEVROLET TRUCK SERVICE MANUAL