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TM 9-2320-364-20-2
2-1416
29. HORN DOES NOT OPERATE (CONT).
9.
Repair wire 1016 (see
schematic Fig 2-36)
or notify DS
Maintenance.
Verify repair, go to
Step 11 of this Fault.
YES
NO
Reverse lights operate
indicating circuit breaker CB3
OK.
Cab heater operates indicating
22 to 28 vdc is input to circuit
breaker CB16.
Circuit breakers CB3 and CB16
are not tripped.
Horn grounded.
Circuit breaker CB16 OK.
Wire 1026 OK.
Wire 1031 OK.
Horn button OK.
Steering column ground OK.
Wire 1016 OK.
Harness wire 1016 faulty.
Horn relay R3 faulty.
Wire 1168 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not measured,
wire 1016 is faulty.
WARNING
Is continuity measured on
wire 1016 between relay R3,
terminal 86 and connector
MC92, terminal A?
Read WARNING
on Page 2-1417
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