SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
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.
F Reconnect wire 486 to circuit breaker side of manifold
preheat switch. Disconnect wire 486 from bulkhead side
of manifold preheat switch. Place red lead of multimeter
on switch terminal and black lead to ground. Turn
MASTER switch on, push START and manifold preheat
switches, and check for voltage. Turn MASTER switch
OFF. If voltage is present, go to step G. If voltage is not
present, replace manifold preheat switch assembly (see
paragraph 4-9).
G Reconnect switch panel to neutral safety switch to
bulkhead wiring harness to main switch panel. Open air
inlet doors (TM 9-2350-256-10). Disconnect bulkhead to
engine harness and starter relay wiring harness from
bulkhead disconnect. Place red lead of multimeter on pin
B of wire 486 and black lead to ground. Turn MASTER
switch on, push START and manifold preheat switches,
and check for voltage. Turn MASTER and manifold
preheat switches OFF. If voltage is present, go to step
H. If voltage is not present, replace/repair wire 486 of
switch panel to neutral safety to bulkhead wiring harness.
H Reconnect bulkhead to engine wiring harness and starter
relay wiring harness to bulkhead disconnect. Disconnect
wire 486 from connector near bulkhead disconnect.
Place red lead of multimeter in female connector and
black lead to ground. Turn MASTER switch on, push
START and manifold preheat switches, and check for
voltage. Turn MASTER switch OFF. If voltage is
present, go to step I. If voltage is not present,
repair/replace wire 486 of bulkhead to engine wiring
harness and starter relay wiring harness from female
connector to bulkhead disconnect (see paragraph 6-72).
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