TM 9-2350-256-20-1
0057 00
CORRECTIVE ACTION Continued
15. Install APU control box (4), four screws (3), four lockwashers (2), and four nuts (1). Reconnect APU
control box to foot dimmer switch and bulkhead wiring harness to APU control box. Disconnect
bulkhead to engine wiring harness and starter relay wiring harness from bulkhead disconnect. Place
red lead of multimeter on pin F of wire J 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 21. If voltage is not present, go to step 16.
16. Reconnect bulkhead to engine wiring harness and starter relay wiring harness to bulkhead. Disconnect
wire J of switch panel to neutral safety switch to bulkhead wiring harness from APU control box to foot
dimmer switch and bulkhead wiring harness. Place red lead of multimeter in female connector wire
J 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, replace wire J of switch panel to neutral
safety to bulkhead wiring harness (see WP 0203 00). If voltage is not present, repair/replace wire J of
APU control box to foot dimmer switch and bulkhead wiring harness (see WP 0229 00).
0057 00-10
