CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Conti nued
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.
G
Reconnect switch panel to head lamps and bulkhead
wiring harness to main switch panel. Remove three
screws (11), three lockwashers (12), ground lead
(13), and flat washer (14) and release main switch
panel (15) from mounting brackets. Disconnect
switch panel to gage panel and miscellaneous
switches wiring harness from main switch panel.
Place red lead of multimeter on pin N of wire 10 and
black lead to ground. Turn MASTER switch on and
check for voltage. Turn MASTER switch OFF. If
voltage is present, go to step H. If voltage is not
present, go to step K.
H
Reconnect
switch
panel
to
gage
panel
and
miscellaneous switches wiring harness to main
switch
panel.
Ground
main
switch
panel.
Disconnect wire 10/15 at connector. Place red lead
of multimeter in wire 10/15 and black lead to ground.
Turn MASTER switch on and check for voltage.
Turn MASTER switch OFF. If voltage is present, go
to step I. If voltage is not present, repair/replace wire
10/15 of main lighting and B.O. selector switch
wiring harness (see paragraph 6-69).
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