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TM 9-2320-364-20-2
2-1528
41. TRAILER MARKER LIGHTS DO NOT OPERATE.
INITIAL SETUP
1.
Go to Step 2 of this
Fault.
START
NO
Trailer brake lights operate
indicating that wire 1435 at
connector MC15 is OK.
22 to 28 vdc not supplied to
connector MC15.
Wire 1676 faulty.
Wire 1017 faulty.
Wire 1435 faulty.
Relay R14 faulty.
Wire 1008C faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #89.
If 22 to 28 vdc are not present,
trailer marker 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)
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 off,
(TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
TM 9-2330-385-14
Are 22 to 28 vdc measured on
wire 1008C at connector
MC15, terminal E?
WARNING
Personnel Required
Two
Go to Trailer
Troubleshooting
(TM 9-2330-385-14).
YES
Read WARNING
on Page 2-1529
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