CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19
ELECTRICAL TROUBLESHOOTING-Continued
TROUBLELIGHT ASSEMBLY-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.
A
Disconnect electrical accessories panel wiring harness
from troublelight assembly. Place red lead of
multimeter in socket B of wire 138 and black lead to
ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is
present, go to step B. If voltage is not present, go to
step C.
B
Place red lead of multimeter in socket A of GND and
black lead to ground. Check for continuity. If
continuity
is
present,
replace
troublelight
(see
paragraph 6-31). If continuity is not present,
repair/replace GND wire of electrical accessories
panel wiring harness (see paragraph 6-47).
C
Disconnect electrical accessories panel wiring harness
from electrical accessories panel. Place a jumper
wire from pin A to socket A of wire 38/59. Place red
lead of multimeter on pin F of wire 38 and black lead
to ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is
present, repair/replace wire 38/138 of electrical
accessories panel wiring harness (see paragraph 6-
47). If voltage is not present, go to step D.
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