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Page Title:
ONE OR BOTH HEADLIGHTS DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
VOLTAGE TEST
(1) Remove four screws from instrument
SCREW
BLACKOUT
panel.
LIGHT SWITCH
(2) Lift instrument panel out to remove
connector J3 from blackout light switch.
(3) Set multimeter to volts dc.
(4) Connect multimeter positive lead (+) to
connector J3-F where wire 40
connects.
(5) Connect multimeter negative lead () to
known good ground.
(6) Connect negative battery cable to
negative side of battery (Para 8-42).
(7) Turn engine start switch to ON position,
BUT DO NOT START ENGINE
(TM 10-3930-673-10).
(a) If 24 vdc is present, go to Step 11
of this fault.
(b) If 24 vdc is not present, repair
wire 40 (Para 8-48).
(8) Turn engine start switch to OFF
position, (TM 10-3930-673-10).
(9) Disconnect negative battery cable from
ENGINE
negative side of battery (Para 8-42).
START
(10) Lift instrument panel out to connect
SWITCH
connector J3 to blackout light switch.
INSTRUMENT
(11) Install four screws to secure instrument
PANEL
panel.
J3-F
VOLTAGE TEST
CONNECTOR J3
(1) Set multimeter to volts dc.
(2) Disconnect connector J1 from
connector P1.
CONNECTOR P1
(3) Connect multimeter positive lead (+) to
connector J1-2 where wire 49
connects.
(4) Connect multimeter negative lead () to
known good ground.
(5) Connect negative battery cable to
negative side of battery (Para 8-42).
(6) Turn engine start switch to ON position,
BUT DO NOT START ENGINE
J1-2
(TM 10-3930-673-10).
(7) Turn blackout light switch to SER.
DRIVE position (TM 10-3930-673-10).
(a) If 24 vdc is present, go to Step 13
CONNECTOR J1
of this fault.
(b) If 24 vdc is not present, go to
Step 12 of this fault.
(8) Turn blackout light switch to OFF
position (TM 10-3930-673-10).
(9) Turn engine start switch to OFF
position, (TM 10-3930-673-10).
(10) Disconnect negative battery cable from
negative side of battery (Para 8-42).
TR01743
2-131
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