CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
B.O. SERVICE CONDITION [IR HEADLIGHTS]-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 headlight
cover (2). Remove lamp (3) and disconnect
connector. Place red lead of multimeter in socket
A of wire 18. Turn MASTER switch on, UNLOCK
and place main lighting switch in B.O. DRIVE
position and B.O. selector switch to IR, and check
for voltage. Turn MASTER and main lighting
switches OFF. If voltage is present, replace lamp.
If voltage is not present, go to step B.
B Install lamp (3), headlight cover (2), and tighten
four screws (1). Loosen adjustment nut (4) and
remove headlight assembly (5). Place red lead of
multimeter in socket D of wire 515 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 IR, and
check for voltage. Turn MASTER, main lighting,
and B.O. SELECTOR switches off. If voltage is
present, go to step C. If voltage is not present, go
to step E.
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