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Page Title:
ONE OR BOTH HEADLIGHTS DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
SCREW
CONTINUITY TEST
BLACKOUT
LIGHT SWITCH
(1) Remove four screws from instrument
panel.
(2) Lift instrument panel out to remove
connector J3 from blackout light switch.
(3) Disconnect connector J1 from
connector P1.
(4) Set multimeter to ohms.
(5) Connect multimeter positive lead (+) to
connector J3-M where wire 49
connects.
(6) Connect multimeter negative lead () to
connector J1-2 where wire 49
connects.
(a) If continuity is present, replace
blackout light switch (Para 8-13).
(b) If continuity is not present, repair
wire 49 (Para 8-48).
(7) Lift instrument panel out to connect
connector J3 to blackout light switch.
ENGINE
(8) Connect connector J1 to connector P1.
START
(9) Install four screws to secure instrument
SWITCH
panel.
INSTRUMENT
PANEL
J3-M
CONNECTOR J3
VOLTAGE TEST
(1) Set multimeter to volts dc.
(2) Connect multimeter positive lead (+) to
headlight male connector where
wire 49 connects.
(3) Connect multimeter negative lead () to
known good ground.
(4) Connect negative battery cable to
negative side of battery (Para 8-42).
J1-2
(5) Turn engine start switch to ON position,
BUT DO NOT START ENGINE
(TM 10-3930-673-10).
(6) Turn blackout light switch to SER.
DRIVE position (TM 10-3930-673-10).
CONNECTOR J1
(a) If 24 vdc is present, go to Step 14
of this fault.
(b) If 24 vdc is not present, repair
wire 49 (Para 8-48).
(7) Turn blackout light switch to OFF
position (TM 10-3930-673-10).
(8) Turn engine start switch to OFF
position, (TM 10-3930-673-10).
(9) Disconnect negative battery cable from
MALE CONNECTOR
negative side of battery (Para 8-42).
TR01744
2-133
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