CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
B.O. DRIVE CONDITION--Continued
WARNING
Remove all jewelry such as rings, dog
tags, bracelets, etc. If jewelry contacts a
metal surface a direct short may result in
instant heating of tools, damage to
equipment, and injury or death to
personnel.
A
Loosen four screws (1) and remove cover (2) of left
hand headlight assembly. Remove lamp and place
red lead of multimeter in socket and black lead to
ground. Turn MASTER switch on, UNLOCK and
place main lighting switch in B.O. DRIVE position,
B.O. SELECTOR switch to B.O. position, and check
for voltage. Turn MASTER and B.O. SELECTOR
switches OFF. If voltage is present, replace bulb
(see paragraph 9-26). If voltage is not present, go to
step B.
B
Disconnect headlight base assembly from left hand
headlight assembly. Place red lead of multimeter in
socket G of wire 19 and black lead to ground. Turn
MASTER switch on, UNLOCK and move main
lighting switch to B.O. DRIVE position, B.O.
SELECTOR switch to B.O. position, and check for
voltage. Turn MASTER, main lighting, and B.O.
SELECTOR switches OFF. If voltage is present,
replace headlight assembly (see paragraph 6-26). If
voltage is not present, go to step C.
2—
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