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TM 9-2320-364-20-2
2-1399
(1) Disconnect wire 1680 from faulty front
composite light.
(2) Connect positive (+) multimeter lead
to wire 1680 from chassis.
(3) Connect negative (–) multimeter lead
to a known good ground.
(4) Turn ON ENGINE switch
(TM 9-2320-364-10).
(a) If 10 to 14 vdc are not present,
turn OFF ENGINE switch and
repair wire 1680 between marker
light splice and marker light (see
schematic Fig 2-35) or notify DS
Maintenance.
(b) If 10 to 14 vdc are present,
turn OFF ENGINE switch and
replace front composite light
(Para 7-46).
(5) Reconnect wire 1680 to front
composite light.
VOLTAGE TEST
Remove all jewelry such as rings, dog tags, bracelets, etc. If jewelry or tools contact positive electrical
circuits, a direct short may result. Damage to equipment, injury or death to personnel may occur.
(1) Turn ON ENGINE switch
(TM 9-2320-364-10).
(2) Inspect blackout clearance and
marker light operation.
(a) If blackout clearance and marker
lights do not operate, fault not
corrected. Perform Steps (3)
through (5) below and notify DS
Maintenance.
(b) If blackout clearance and marker
lights operate, fault has been
corrected.
(3) Turn off BLACKOUT MARKER
light switch.
(4) Turn off BLACKOUT LIGHT
selector switch.
(5) Turn OFF ENGINE switch.
VERIFY REPAIR
STEERING WHEEL SHOWN
REMOVED FOR
CLARITY
BLACKOUT
SELECTOR SWITCH
ENGINE SWITCH
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