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.
L Remove four nuts (1), four lockwashers (2), four screws
(3), and APU control box (4) from mounting brackets.
Place a jumper from pin H to socket H. Place red lead
of multimeter on pin L of 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, go to step 0. If
voltage is not present, go to step P.
M Reconnect APU control box to foot dimmer switch and
bulkhead wiring harness to APU control box. Remove
four screws (5), four lockwashers (6), and rear panel (7)
from APU control box (4). Disconnect wire C of APU
control box wiring harness from APU GEN switch.
Place red lead of multimeter in wire C and black lead to
ground. Turn MASTER and APU GEN switches on and
check for voltage. If voltage is present, go to step N. If
voltage is not present, repair/replace wire C of APU
control box wiring harness (see paragraph 13-7).
2-152