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.
O Reconnect bulkhead to engine wiring harness and
starter relay wiring harness to bulkhead disconnect.
Disconnect wire 61 of bulkhead to engine wiring
harness and starter relay wiring harness from wire 61
of bulkhead to APU, master relay, and rigger's lights
wiring harness. Place red lead of multimeter on male
connector 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, repair/replace wire 61 of
bulkhead to engine wiring harness and starter relay
wiring harness to bulkhead disconnect (see paragraph
6-72). If voltage is not present, repair/replace wire 61
of bulkhead to APU, master relay, and rigger's lights
wiring harness (see paragraph 6-75).
P Reconnect bulkhead to engine wiring harness and
starter relay wiring harness to bulkhead disconnect.
Disconnect wire 61A from hydraulic pressure switch.
Place red lead of multimeter in wire 61A and black
lead to ground. Turn MASTER, APU pressure 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 to
step Q.
Q Reconnect wire 61A to hydraulic pressure switch.
Disconnect wire 61A of bulkhead to engine wiring
harness and starter relay wiring harness from
bulkhead to APU, master relay, and rigger's lights
wiring harness. Place red lead of multimeter on male
connector 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, repair/replace wire 61A of
bulkhead to APU, master relay, and rigger's lights
wiring harness (see paragraph 6-75). If voltage is not
present, notify Direct Support Maintenance.
2-145
