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 65 to APU START switch. Disconnect
wire 65A from APU START switch. Place red lead of
multimeter in wire 65A and black lead to ground. Turn
MASTER and PREHEAT switches ON, and check for
voltage. Turn MASTER and PREHEAT switches OFF.
If voltage is not present, go to step G. If voltage is
present, replace START switch (see paragraph 13-7).
G
Reconnect
wire
65A
to
APU
START
switch.
Disconnect wire 65A from APU START switch side of
15 A circuit breaker. Place red lead of multimeter on
terminal of 15 A circuit breaker and black lead to
ground. Turn MASTER, and PREHEAT switches ON
and check for voltage. Turn MASTER, and PREHEAT
switches OFF. If voltage is not present, go to step H.
If voltage is present, repair/replace wire 65A of APU
control box wiring harness (see paragraph 13-7).
2-165