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TM 9-2320-364-20-2
2-1384
26. REAR BLACKOUT CLEARANCE OR TAILLIGHT DOES NOT OPERATE (CONT).
10 to 14 vdc present to blackout
clearance light lamp socket.
Blackout clearance light faulty.
Blackout clearance light lamp
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
Blackout clearance light will not
operate if outer contact of
socket is not grounded.
YES
NO
Replace blackout
clearance light
(Para 7-53).
Verify repair, go to
Step 9 of this Fault.
4.
Is continuity measured
between outer contact of
faulty blackout clearance light
socket and a known good
ground?
Replace blackout
clearance light lamp
(Para 7-53).
Verify repair, go to
Step 9 of this Fault.
WARNING
Blackout taillights operate
indicating 10 to 14 vdc are
present to wire 1680.
Blackout clearance light lamp
grounded.
Wire 1680 between clearance
light splice and clearance
light faulty.
Blackout clearance light faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Voltage test.
STE/ICE-R #89.
If 10 to 14 vdc are not
measured, blackout clearance
light will not operate.
YES
NO
Repair wire 1680 (see
schematic Fig 2-35)
or notify DS
Maintenance.
Verify repair, go to
Step 9 of this Fault.
5.
Are 10 to 14 vdc measured on
wire 1680 at blackout
clearance light?
Replace blackout
clearance light
(Para 7-51).
Verify repair, go to
Step 9 of this Fault.
WARNING
Read WARNING
on Page 2-1385
Read WARNING
on Page 2-1385
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