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TM 9-2320-364-20-2
2-1394
27. FRONT BLACKOUT CLEARANCE OR MARKER LIGHT DOES NOT OPERATE
(CONT).
Front blackout marker lights
operate indicating 10 to 14 VDC
present to wire 1680 junction.
Wire 1680 between marker light
splice and clearance light
splice OK.
Wire 1680 between clearance
light splice and clearance
light OK.
Blackout clearance light faulty.
Blackout clearance light lamp
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Continuity test.
STE/ICE-R #91.
If socket ground contact is not
grounded, blackout clearance
light will not operate.
YES
NO
Replace blackout
clearance light
(Para 7-52).
Verify repair, go to
Step 9 of this Fault.
4.
Is continuity measured
between socket ground
contact of faulty blackout
clearance light socket and a
known good ground?
Replace blackout
clearance light lamp
(Para 7-52).
Verify repair, go to
Step 9 of this Fault.
WARNING
Front blackout marker lights
operate indicating 10 to 14 VDC
present to wire 1680 junction.
Wire 1680 between marker light
splice and clearance light
splice OK.
Blackout clearance light faulty.
Wire 1680 between clearance
light splice and 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 to faulty blackout
clearance light?
Replace blackout
clearance light
(Para 7-51).
Verify repair, go to
Step 9 of this Fault.
WARNING
Read WARNING
on Page 2-1395
Read WARNING
on Page 2-1395
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