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TM 9-2320-364-20-2
2-1376
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 OK.
Blackout stoplight lamp faulty.
Rear composite light faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If the blackout stoplight socket is
faulty, blackout stoplight will not
operate.
YES
NO
Replace composite
light (Para 7-47).
Verify repair, go to
Step 6 of this Fault.
4.
Is blackout stoplight
grounded and free from
damage?
Replace blackout
stoplight lamp
(Para 7-51).
Verify repair, go to
Step 6 of this Fault.
WARNING
Regular stoplights operate
indicating 10 to 14 vdc present
on wire 1005 to BLACKOUT
LIGHTS selector switch and
wire 1435 is OK.
Rear composite light OK.
Blackout stop lamp OK.
Wire 1678 faulty.
BLACKOUT LIGHTS selector
switch faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If continuity is not measured,
BLACKOUT LIGHTS selector
switch is faulty.
YES
NO
Replace BLACKOUT
LIGHT selector switch
(Para 7-27).
Verify repair, go to
Step 6 of this Fault.
5.
Is continuity measured on
BLACKOUT LIGHTS selector
switch, terminals 2 and 6?
Repair wire 1678 (see
schematic Fig 2-35)
or notify DS
Maintenance.
Verify repair, go to
Step 6 of this Fault.
WARNING
Read WARNING
on Page 2-1377
Read WARNING
on Page 2-1377
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