TM 9-2350-256-20-1
0056 00
CORRECTIVE ACTION Continued
3.
Reconnect batteries to master relay, voltage regulator, and slave receptacle wiring harness to APU
regulator. Disconnect bulkhead to APU to master relay and rigger's lights wiring harness from APU
regulator. Place red lead of multimeter in socket F of wire 61 and black lead to ground. Turn MASTER
and APU GEN switches ON, start APU, and check for voltage. Turn APU and MASTER and APU
GEN switches OFF. If voltage is present, go to step 4. If voltage is not present, replace APU voltage
regulator (see WP 0154 00).
4.
Place red lead of multimeter on pin C of wire 478A and black lead to ground. Turn MASTER and APU
GEN switches ON, start APU, and check for voltage. Turn MASTER and APU GEN switches OFF. If
voltage is not present, replace APU regulator (see WP 0154 00). If voltage is present, go to step 5.
0056 00-4