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TM 10-3930-673-20-1
SCREW
BLACKOUT
LIGHT SWITCH
VOLTAGE TEST
(1) Remove connector J3 from blackout
light switch.
(2) Set multimeter to volts dc.
(3) Connect multimeter positive lead (+) to
connector J3-F where wire 40
connects.
(4) Connect multimeter negative lead () to
known good ground.
(5) Connect negative battery cable to
negative side of battery (Para 8-44).
(6) 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
ENGINE
of this fault.
START
(b) If 24 vdc is not present, repair
SWITCH
wire 40 (Para 8-48).
(7) Turn engine start switch to OFF
INSTRUMENT
position (TM 10-3930-673-10).
(8) Disconnect negative battery cable from
PANEL
negative side of battery (Para 8-44).
(9) Connect connector J3 to blackout light
switch.
J3-F
CONNECTOR J3
TR01145
2-111
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