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.
G Reconnect bulkhead to APU to master relay and rigger's
lights wiring harness to APU regulator. Disconnect APU
control box to foot dimmer switch and bulkhead wiring
harness from APU control box. Place red lead of
multimeter in socket H of wire 61 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 H. If
voltage is not present, go to step M.
H Remove four nuts (1), four lockwashers (2), four screws
(3), and release 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 61A 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 K.
If voltage is not present, go to step I.
2-141
