CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
APU GENERATOR SYSTEM (DUAL 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.
I Reconnect APU control box to foot dimmer switch and
bulkhead wiring harness to APU control box. Remove
four screws (5) and four lockwashers (6), and release
rear panel (7) from APU control box (4). Disconnect
wire 61 of APU control box wiring harness from APU
GEN switch. Place red lead of multimeter in wire 61
and black lead to ground. Turn MASTER and APU
GEN switch ON and check for voltage. If voltage is
present, go to step J. If voltage is not present,
repair/replace APU control box wiring harness (see
paragraph 13-7).
J Reconnect wire 61 to APU GEN switch. Disconnect wire
61A from APU GEN switch. Place red lead of
multimeter on APU GEN switch terminal 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, repair/replace wire
61A of APU control box wiring harness (see paragraph
13-7). If voltage is not present, replace APU GEN
switch (see paragraph 13-7).
2-142
