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TM 9-2320-364-20-2
2-1374
25. BLACKOUT STOPLIGHTS DO NOT OPERATE (CONT).
Regular stoplights operate
indicating 10 to 14 vdc present
on wire 1005 to BLACKOUT
LIGHTS selector switch and
wire 1435 is OK.
Wire 1678 faulty.
Rear composite light faulty.
Blackout stoplight lamp faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If wire 1678 is loose, faulty, or
shorted to ground, blackout
stoplight will not operate.
YES
NO
Repair wire 1678 (see
schematic Fig 2-35).
Verify repair, go to
Step 6 of this Fault.
3.
Are 10 to 14 vdc measured on
wire 1678 at blackout
stoplight?
Replace rear
composite light
(Para 7-47).
Verify repair, go to
Step 6 of this Fault.
WARNING
Read WARNING
on Page 2-1375
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