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Page Title:
HORN DOES NOT OPERATE - continued |
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 TM 10-3930-673-20-1
2. HORN DOES NOT OPERATE (CONT).
14
KNOWN INFO
TEST OPTIONS
Horn OK.
Continuity test.
Is continuity present on wire 2
Wire 22 OK.
STE/ICE-R #91.
between connector J2-2 and
Horn switch OK.
REASON FOR QUESTION
negative battery cable?
Wire 20 OK.
This question eliminates possible
Circuit breaker CB10 OK.
problems and determines where
Wire 29 OK.
troubleshooting continues.
Relay K4 OK.
Wire 1 OK.
Circuit breaker CB6 OK.
Connector J2-1 OK.
Connector P2-1 OK.
POSSIBLE PROBLEMS
Connector J2-2 faulty.
Connector P2-2 faulty.
Repair
NO
Wire 2 faulty.
connector J2
(Para 8-48).
YES
Replace horn (Para
8-41).
15
KNOWN INFO
TEST OPTIONS
Horn OK.
Continuity test.
Is continuity present on wire 9
Wire 22 OK.
STE/ICE-R #91.
between connector P2-1 and
Horn switch OK.
REASON FOR QUESTION
wire 9, where wire 9 connects
Wire 20 OK.
If continuity is not present, wire 9
Circuit breaker CB10 OK.
to circuit breaker CB6?
or connector P2 faulty.
Wire 29 OK.
Relay K4 OK.
Wire 1 OK.
Circuit breaker CB6 OK.
POSSIBLE PROBLEMS
Connector J2 faulty.
Connector P2 faulty.
Wire 9 faulty.
Repair wire 9 or
NO
connector P2
(Para 8-49).
YES
2-60
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