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Page Title:
STOPLIGHT(S) DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
7. STOPLIGHT(S) DO NOT OPERATE (CONT).
11
KNOWN INFO
TEST OPTIONS
Bulbs OK.
Voltage test.
Is 24 vdc present at brake
Connector P2 OK.
STE/ICE-R #89.
light switch where wire 41
Connector J2 OK.
REASON FOR QUESTION
connects?
Wire 9 OK.
If 24 vdc is not present, blackout
Circuit breaker CB6 OK.
lighting switch or wire 41 faulty.
Wire 1 OK.
Run relay OK.
Wire 3 OK.
Circuit breaker CB4 OK.
Wire 40 OK.
POSSIBLE PROBLEMS
Blackout light switch faulty.
Wire 41 faulty.
Brake switch faulty.
Go to Step 12 of
NO
Wire 42 faulty.
this fault.
Wire 43 faulty.
Connector J1 faulty.
Connector P1 faulty.
YES
Socket(s) faulty.
Go to Step 13 of
this fault.
12
KNOWN INFO
TEST OPTIONS
Bulbs OK.
Continuity test.
Is continuity present between
Connector P2 OK.
STE/ICE-R #88.
connector J3-A and brake
Connector J2 OK.
REASON FOR QUESTION
light switch?
Wire 9 OK.
If continuity is not present, wire 41
Circuit breaker CB6 OK.
faulty.
Wire 1 OK.
Run relay OK.
Wire 3 OK.
Circuit breaker CB4 OK.
Wire 40 OK.
POSSIBLE PROBLEMS
Blackout light switch faulty.
Wire 41 faulty.
Brake switch faulty.
Repair wire 41
NO
Wire 42 faulty.
(Para 8-48).
Wire 43 faulty.
Connector J1 faulty.
Connector P1 faulty.
YES
Socket(s) faulty.
Replace blackout
control switch
(Para 8-13).
2-150
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