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TM 9-2320-364-20-2
2-1392
27. FRONT BLACKOUT CLEARANCE OR MARKER LIGHT DOES NOT OPERATE
(CONT).
2.
Repair wire 1680 (see
schematic Fig 2-35)
or notify DS
Maintenance.
Verify repair, go to
Step 9 of this Fault.
YES
NO
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 faulty.
Blackout clearance light faulty.
Blackout clearance light
lamp faulty.
Wire 1680 between clearance
light splice and clearance light
faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Fault is common to both front
blackout clearance lights if both
do not light.
WARNING
3.
Go to Step 5 of this
Fault.
YES
NO
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.
Blackout clearance light lamp
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.
WARNING
Does at least one blackout
clearance light operate?
Are 10 to 14 vdc measured on
socket power contact of
blackout clearance light?
Read WARNING
on Page 2-1393
Read WARNING
on Page 2-1393
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