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.
E
Remove three screws (3), three lockwashers (4),
ground lead (5), flat washer (6), and release main
switch panel (7) from mounting bracket. Reconnect
wire 19 of headlight and dimmer switch panel to
gage panel and miscellaneous switches wiring
harness. Disconnect wire 19 from B.O. SELECTOR
switch. Place red lead of multimeter on terminal of
switch and black lead to ground. Turn MASTER
switch on, UNLOCK and move main lighting switch
to B.O. DRIVE position, and 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, repair/replace
wire 19 of main lighting and B.O. selector switch
wiring harness (see paragraph 6-69). If voltage is
not present, go to step F.
F
Reconnect wire 19 to B.O. SELECTOR switch.
Disconnect wire 520 from B.O. SELECTOR switch.
Place red lead of multimeter in wire 520 and black
lead to ground. Turn MASTER switch on, UNLOCK
and move main lighting switch to B.O. DRIVE
position, and check for voltage. Turn MASTER and
main lighting switches OFF. If voltage is present,
replace switch (see paragraph 6-10). If voltage is not
present, go to step G.
2—
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