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HORN DOES NOT OPERATE - continued - TM-10-3930-673-20-10103
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TM-10-3930-673-20-1 All Terrain Lifter Army System (ATLAS) 10 000 lb Capacity Manual
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HORN DOES NOT OPERATE - continued - TM-10-3930-673-20-10105
TM 10-3930-673-20-1
2. HORN DOES NOT OPERATE (CONT).
6
KNOWN INFO
TEST OPTIONS
Horn OK.
Voltage test.
Is 24 vdc present at relay K4
Wire 22 OK.
STE/ICE-R #89.
where wire 29 connects?
Horn switch OK.
REASON FOR QUESTION
Wire 20 OK.
If voltage is present, wire 29 faulty.
Circuit breaker CB10 OK.
POSSIBLE PROBLEMS
Wire 29 faulty.
Relay K4 faulty.
Wire 1 faulty.
Circuit breaker CB6 faulty.
Wire 9 faulty.
Connector J2 faulty.
Connector P2 faulty.
Go to Step 7 of this
NO
fault.
YES
Repair wire 29
(Para 8-48).
7
KNOWN INFO
TEST OPTIONS
Horn OK.
Voltage test.
Is 24 vdc present at relay K4
Wire 22 OK.
STE/ICE-R #89.
where wire 1 connects?
Horn switch OK.
REASON FOR QUESTION
Wire 20 OK.
If voltage is present, relay K4
Circuit breaker CB10 OK.
faulty.
Wire 29 OK.
POSSIBLE PROBLEMS
Relay K4 faulty.
Wire 1 faulty.
Circuit breaker CB6 faulty.
Wire 9 faulty.
Connector J2 faulty.
Connector P2 faulty.
Go to Step 8 of this
NO
fault.
YES
Replace relay K4
(Para 8-23).
2-52

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