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TM 9-2320-364-20-2
2-1216
9. BEACON LIGHT DOES NOT OPERATE.
INITIAL SETUP
1.
Go to Step 3 of this
Fault.
START
YES
NO
Horn operates, indicating circuit
breaker CB3 OK.
Dome light operates, indicating
10 to 14 vdc to wire 1276.
10 to 14 vdc not supplied to
wire 1029.
Wire 1435 faulty.
Wire 1276 faulty.
Beacon light switch faulty.
Wire 1413 faulty.
Wire 1184 faulty.
Relay R6 not grounded.
Beacon relay R6 faulty.
Wire 1029 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If wire 1029 is loose, faulty, or
shorted to ground, beacon light
will not operate.
2-20. ELECTRICAL SYSTEM TROUBLESHOOTING (CONT).
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Jumperwire
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Are 10 to 14 vdc measured on
wire 1029 at beacon light?
WARNING
Read WARNING
on Page 2-1217
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