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TM 9-2320-364-20-2
2-1358
23. ALL BLACKOUT 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
Windshield wipers operate
indicating 12 vdc to circuit
breaker CB9.
Circuit breaker CB9 not tripped.
Wire 1674 faulty.
BLACKOUT LIGHTS selector
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If wire 1674 is loose, faulty, or
shorted to ground, 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)
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
Materials/Parts
Preformed Packing (Item 223, Appendix F)
Is continuity measured on
wire 1674 between
BLACKOUT MARKER lights
switch, terminal 5 and
BLACKOUT LIGHTS selector
switch, terminal 1?
WARNING
Read WARNING
on Page 2-1359
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