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TM 9-2320-364-20-2
2-1552
References
TM 9-2320-364-10
TM 9-4910-571-12&P
TM 9-2330-385-14
44. TRAILER BLACKOUT TAILLIGHTS DO NOT OPERATE.
INITIAL SETUP
1.
Go to Step 2 of this
Fault.
START
NO
Turn signals operate, indicating
wire 1435 at connector
MC15 OK.
22 to 28 vdc not supplied to
connector MC15.
Wire 1676 faulty.
Wire 1435 faulty.
Blackout taillight relay
R17 faulty.
Wire 1680C faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 22 to 28 vdc are not present,
blackout lights 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)
Personnel Required
Two
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
BLACKOUT LIGHTS selector switch on,
(TM 9-2320-364-10)
Are 22 to 28 vdc measured on
wire 1680C at connector
MC15, terminals A, C, and H?
Go to Trailer
Troubleshooting
(TM 9-2330-385-14).
YES
WARNING
Read WARNING
on Page 2-1553
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