TM 9-2350-256-20-1
0056 00
CORRECTIVE ACTION Continued
5.
Reconnect bulkhead to APU, master relay, and rigger's lights wiring harness to APU regulator. Open
center-front air inlet doors (TM 9-2350-256-10). Disconnect bulkhead to APU, master relay, and
rigger's lights wiring harness from APU engine disconnect. Place red lead of multimeter on pin H
of wire 478A. Turn MASTER and APU GEN switches ON and check for voltage. Turn MASTER
and APU GEN switches OFF. If voltage is not present, repair/replace wire 478A of bulkhead to APU,
master relay, and rigger's lights wiring harness (see WP 0224 00). If voltage is present, go to step 6.
Reconnect bulkhead to APU, master relay, and rigger's lights wiring harness to APU regulator.
6.
Disconnect bulkhead to APU, master relay, and rigger's lights wiring harness from APU engine
disconnect. Place red lead of multimeter in socket G of wire 62 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 7. If voltage is not present, repair/replace wire 62 of bulkhead to
APU, master relay, and rigger's lights wiring harness (see WP 0224 00).
0056 00-5
