CHAPTER E: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
B.O. SERVICE CONDITION (B.O. STOPLIGHT}-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
Place red lead of multimeter on pin D of wire 75/16
and black lead on pin L of wire 75. Check for
continuity. If continuity is present, go to step F. If
continuity is not present, go to step I.
F
Reconnect switch panel to gage panel and
miscellaneous switches wiring harness to main
switch panel. Disconnect wire 75 of main lighting
and B.O. selector switch wiring harness at
connector. Place red lead of multimeter in female
connector of wire 75 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, repair/replace
wire 75 of main lighting and B.O. selector switch
wiring harness (see paragraph 6-69). If voltage is
not present, go to step G.
G
Reconnect wire 75 of main lighting and B.O.
selector
switch
wiring
harness
at
connector.
Disconnect main lighting and master relay wiring
harness from main lighting switch. Place red lead of
multimeter on pin N of and black lead on pin K of
main switch. Check for continuity. If continuity is
present, go to step H. If continuity is not present,
replace main lighting switch (see paragraph 6-10).
2—
302
