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.
A Open air inlet doors (TM 9-2350-256-10). Disconnect
batteries to master relay voltage regulator and slave
receptacle wiring harness from APU regulator. Place
red lead of multimeter on pin A of wire 62 and black
lead to ground. Turn MASTER and APU GEN switches
on and check for voltage. Turn MASTER and APU
GEN switches OFF. If voltage is not present,
troubleshoot battery circuit. If voltage is present, go to
step B.
B Place red lead of multimeter in socket A of wire 62 and
black lead to ground. Turn MASTER and APU GEN
switches ON, start APU, and check for voltage. Turn
MASTER and APU GEN switches OFF. If voltage is
present, go to step C. If voltage is not present, replace
APU voltage regulator (see paragraph 6-5).
C Reconnect batteries to master relay, voltage regulator,
and slave receptacle wiring harness to APU regulator.
Disconnect bulkhead to APU to master relay and
rigger's lights wiring harness from APU regulator. Place
red lead of multimeter in socket F of wire 61 and black
lead to ground. Turn MASTER and APU GEN switches
ON, start APU, and check for voltage. Turn APU and
MASTER and APU GEN switches OFF. If voltage is
present, go to step D. If voltage is not present, replace
APU voltage regulator (see paragraph 6-5).
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