Chevrolet Light Duty Truck 1973 Service Manual page 89

BLOWER RESISTOR
Fig. 66-Resistor, Relay and Thermostatic Switch (C-K
5. To replace, reverse Steps 1-4 above.
NOTE: Be sure to use new "O " rings, coated
with clean refrigeration oil, when installing
the switch.
6. Evacuate charge and check system operation.
FUSE
A 25 amp fuse, located in the junction block protects the
entire air conditioning system except for the blower
when operating at HI.
A second 25 amp fuse, to protect the HI speed blower
circuit, is located in the electrical wiring between the
junction block and the blower relay (fig. 69).
BLOWER RELAY
THERMOSTATIC SWITCH
Models)
HEATER AND AIR C O N D IT IO N IN G
THERMOSTATIC
SWITCH ASSEMBLY
POSITION IN
Fig. 67-Replacing Thermostatic Switch
1A-63
EVAPORATOR
CORE i
CAPILLARY
CORE
LIGHT DUTY TRUCK SERVICE MANUAL