CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
APU FUEL SOLENOID SYSTEM-Continued
WARNING
Remove all jewelry such as rings, dog
tags, bracelets, etc. If jewelry contacts a
metal surface a direct short may result in
instant
heating
of
tools,
damage
to
equipment,
and
injury
or
death
to
personnel.
C
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. Open air inlet
doors (TM 9-2350-256-10). 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
paragraph 6-53). If voltage is not present,
troubleshoot master relay circuit (see paragraph 2-19,
master relay fails to operate).
2-170
