CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
SERVICE 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.
J
Reconnect switch panel to gage panel and
miscellaneous switches wiring harness to main
switch panel. Disconnect main lighting and
master relay wiring harness from main lighting
switch. Place a jumper wire from pin F to socket
F. Place red lead of multimeter on pin M of wire
16 and black lead to ground. Turn MASTER
switch on, UNLOCK and place main lighting
switch in SER. DRIVE position, and auxiliary
switch in any position other than PARK, and check
for voltage. Turn MASTER and main lighting
switches OFF. If voltage is present, go to step M.
If voltage is not present, go to step N.
K
Reconnect main lighting and master relay wiring
harness to main lighting switch. Disconnect wire
16 of main lighting and master relay wiring
harness at connector. Place red lead of
multimeter on male connector of wire 16 and
black lead to ground. Turn MASTER switch on,
UNLOCK and place main lighting switch in SER.
DRIVE position, and auxiliary switch in any
position other than PARK, and check for voltage.
Turn MASTER and main lighting switches OFF. If
voltage is present, repair/replace wire 16 of main
lighting and B.O. selector switch wiring harness
(see paragraph 6-69). If voltage is not present,
repair/replace wire 16 of main lighting and master
relay wiring harness (see paragraph 6-70).
L
Place red lead of multimeter in socket F of wire 15
and black lead to ground. Turn MASTER switch
on and check for voltage. Turn MASTER switch
OFF. If voltage is present, replace main lighting
switch (see paragraph 6-10). If voltage is not
present, go to step M.
2-278
