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 TM 5-4120-393-14
4-38.
Mode Selector (Rotary) Switch (S) (cont)
INSPECTION
1.
Check switch to see that all leads are properly connected. See wiring diagram, para 4-13.
2.
Repair or replace all broken leads.
3.
Check that switch terminals are not loose, broken, or corroded.
4.
Check switch for evidence of overheating or other visible damage.
SWITCH POSITION
CONTACT
1
2
3
4
5
NO.
HIGH HEAT
LOW HEAT
OFF
VENT
COOL
12 & 1A
CLOSED
CLOSED
OPEN
OPEN
OPEN
S/WA
12 & 1B
OPEN
OPEN
OPEN
OPEN
CLOSED
11 & 1D
OPEN
OPEN
OPEN
CLOSED
CLOSED
S/WB
22 & 2B
CLOSED
CLOSED
OPEN
CLOSED
CLOSED
S/WD
41 & 4C
CLOSED
OPEN
OPEN
OPEN
OPEN
4-91
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