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Page Title:
BLACKOUT STOPLIGHTS DO NOT OPERATE - continued |
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 TM 10-3930-673-20-1
VOLTAGE TEST
(1) Set multimeter to volts dc.
(2) Connect multimeter positive lead (+) to
brake switch where wire 42 connects.
(3) Connect multimeter negative lead () to
known good ground.
(4) Connect negative battery cable to
negative side of battery (Para 8-42).
BRAKE
L
(5) Turn engine start switch to ON position,
S IGHT
BUT DO NOT START ENGINE
WITCH
(TM 10-3930-673-10).
(6) Turn blackout light switch to B. O.
DRIVE position (TM 10-3930-673-10).
(7) Depress brake pedal
(TM 10-3930-673-10).
(a) If 24 vdc is present, go to Step 14
of this fault.
W4RE
I
(b) If 24 vdc is not present, replace
2
brake light switch (Para 8-17).
(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).
TR01648
2-359
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