CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
APU GENERATOR SYSTEM (SINGLE VOLTAGE)-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.
P Reconnect bulkhead to engine wiring harness and
starter relay wiring harness to bulkhead. Disconnect
wire J of switch panel to neutral safety switch to
bulkhead wiring harness from APU control box to foot
dimmer switch and bulkhead wiring harness. Place red
lead of multimeter in female connector wire J 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 present, replace wire J
of switch panel to neutral safety to bulkhead wiring
harness (see paragraph 6-54). If voltage is not present,
repair/replace wire J of APU control box to foot dimmer
switch and bulkhead wiring harness (see paragraph 6-
80).
Q Reconnect APU control box to foot dimmer switch and
bulkhead
wiring
harness
to
APU
control
box.
Disconnect bulkhead to engine harness and starter relay
wiring harness from bulkhead disconnect. Place red
lead of multimeter in socket G of wire C 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 present, go to step R. If
voltage is not present, go step S.
2-154
