CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
B.O. MARKER 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.
D
Loosen six screws (6) and remove cover (7) and
lamp. Place red lead of multimeter in socket and
black lead to ground. Turn MASTER switch on,
UNLOCK and move main lighting switch to B.O.
MARKER position, and check for voltage. Turn
MASTER and main lighting switches OFF. If voltage
is present, replace lamp (see paragraph 6-30). If
voltage is not present, go to step E.
E
Remove two screws (8), two lockwashers (9), and
hydraulic access plate (10). Disconnect wire 24 of
bulkhead to master relay and left and right taillight
wiring harness from taillight. Place red lead of
multimeter in wire 24 and black lead to ground. Turn
MASTER switch on, UNLOCK and move main
lighting switch to B.O. MARKER position, and check
for voltage. Turn MASTER and main lighting
switches OFF. If voltage is present, replace lamp
(see paragraph 6-26). If voltage is not present, go to
step F.
2—
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