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TM5-4120-376-14
4-22. JUNCTION BOX AND CONTROL MODULE ASSEMBLY/Inspect, Test, Replace (Cont)
LOCATION/ITEM
Test:
Evaporator Fan Speed Switch (S-2)
1. Place evaporator fan speed (S-2) in LOW position.
2. Use a multimeter and test between terminals 1 and 3.
3. If continuity does not exist in any of the four test positions the circuit breaker is
defective.
4.
5.
6.
7.
Replace defective evaporator fan.
Place evaporator fan speed (S-2) in HIGH position.
Use a multimeter and test between terminals 1 and 2.
If continuity does not exist in any of the four test positions the circuit breaker is
d e f e c t i v e .
8. Replace defective evaporator fan.
Mode Selector Switch (S-1)
1. Use a multimeter and test between terminaIs.
2. If continuity does not exist in any of the test positions, the mode selector switch is
defective.
3. Replace defective mode selector.
Temperature Selector (S-3)
1.
2.
3.
4.
5.
6.
7.
Place thermostat (S-3) sensor bulb in ambient temperature of 85 to 100°F (30 to 40°C).
Place the thermostat (S-3) in COOLER position.
Using a multimeter check for continuity between terminals 1 and 3.
If continuity does not exist the temperature selector is defective.
Replace defective temperature selector (S-3).
Place thermostat (S-3) sensor bulb in a container of cold H20, 40 to 65°F (5 to 18°C).
Place the temperature selector (S-3) in WARMER.
4-101
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