TM 9-2350-256-20-1
0063 00
CORRECTIVE ACTION Continued
4.
Remove four nuts (6), four lockwashers (7), and four screws (8), and release APU control box (9) from
mounting bracket. Place a jumper wire from pin N to socket N. Place red lead of multimeter on pin M
of wire 420 and black lead to ground. Turn MASTER and APU FUEL SHUTOFF switches ON, and
check for voltage. Turn MASTER and APU FUEL SHUTOFF switches OFF. If voltage is present, go
to step 11. If voltage is not present, go to step 5.
5.
Reconnect APU control box to foot dimmer switch and bulkhead wiring harness to APU control box.
Remove four nuts (10) and four lockwashers (11), and pull rear panel (12) from APU control box (9).
Disconnect wire 419 from panel connector side 15 A circuit breaker. Place red lead of multimeter in
wire 419 and black lead to ground. Turn MASTER switch on and check for voltage. Turn MASTER
switch OFF. If voltage is present, go to step 6. If voltage is not present, repair/replace wire 419 of APU
control box wiring harness (see WP 0438 00).
0063 00-5
