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TM 9-2320-364-20-2
2-1400
28. BLACKOUT TAIL, MARKER AND CLEARANCE LIGHTS DO NOT OPERATE.
INITIAL SETUP
1.
Repair wire 1674 (see
schematic Fig 2-35)
or notify DS
Maintenance.
Verify repair, go to
Step 3 of this Fault.
START
YES
NO
Blackout drive light operates
indicating 10 to 14 vdc on wire
1674.
Wire 1674 faulty.
Blackout marker switch faulty.
Wire 1680 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 10 to 14 vdc are not present,
blackout tail, marker and
clearance 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)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Are 10 to 14 vdc measured on
blackout marker switch
connector, terminal 5?
WARNING
Read WARNING
on Page 2-1401
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