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 TM 10-3930-673-20-1
2
2. HORN DOES NOT OPERATE.
INITIAL SETUP
Personnel Required
Tools and Special Tools
Two
Tool Kit, General Mechanic's: Automotive
(Item 18, Appendix F)
References
STE/ICE-R (Item 17, Appendix F)
TM 10-3930-673-10
Multimeter, Digital (Item 9, Appendix F)
Equipment Condition
Engine shut down (TM 10-3930-673-10)
Parking brake on (TM 10-3930-673-10)
Wheels chocked (TM 10-3930-673-10)
START
WARNING
1
KNOWN INFO
TEST OPTIONS
Read WARNING on
None.
Voltage test.
following page.
STE/ICE-R #89.
POSSIBLE PROBLEMS
REASON FOR QUESTION
Is 24 vdc present at horn
Horn faulty.
Wire 22 faulty.
If voltage is present, horn faulty or
where wire 22 connects with
Horn switch faulty.
wire 2 faulty.
horn button pressed?
Wire 20 faulty.
Circuit breaker CB10 faulty.
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 2 of this
NO
fault.
YES
Go to Step 12 of
this fault.
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