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TM 9-2320-364-20-2
2-1362
24. BLACKOUT DRIVE LIGHT DOES NOT OPERATE.
INITIAL SETUP
1.
Replace blackout
drive light lamp
(Para 7-51).
Verify repair, go to
Step 6 of this Fault.
START
YES
NO
Blackout marker lights operate
indicating 10 to 14 vdc to
wire 1674.
Blackout drive light lamp faulty.
Wire 1679 faulty.
Blackout drive light faulty.
Wire 1674 faulty.
BLACKOUT DRIVE switch
faulty.
Wire 1679 faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If blackout drive light lamp
filament is faulty, the lamp 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
Is continuity measured across
blackout drive light?
WARNING
Read WARNING
on Page 2-1363
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