TM 9-2350-256-20-1
0063 00
CORRECTIVE ACTION Continued
2.
Reconnect APU control box to foot dimmer switch and bulkhead wiring harness to APU control box.
Remove three screws (1), three lockwashers (2), ground wire (3), and flat washer (4) and release main
switch panel (5) from mounting bracket. Disconnect wire 10-419 from Y-connector of switch panel,
radio, and bilge pump to bulkhead wiring harness at main switch panel. Turn MASTER switch on, and
check for voltage. If voltage is present, repair wire 419 from Y-connector at main switch panel to APU
control box bulkhead wiring harness. If voltage is not present, go to step 3.
3.
Reconnect wire 10-419 to Y-connector of switch panel, radio, and bilge pump to bulkhead wiring
harness to main switch panel. Install main switch panel (5), flat washer (4), ground wire (3), three
lockwashers (2), and three screws (1) to mounting bracket. Disconnect wire 48 pin A from bulkhead
to master relay wiring harness. Place red multimeter lead in socket and black lead to ground. Turn
MASTER switch on and check for voltage. If voltage is present, repair/replace switch panel, radio, and
bilge pump to bulkhead wiring harness (see WP 0202 00). If voltage is not present, troubleshoot master
relay circuit (see WP 0042 00).
0063 00-4
