CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
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.
Reconnect wire 38/518 to winch light switch side of 15
A circuit breaker. Disconnect wire 38/518 from panel
connector side of 15 A circuit breaker. Place red lead
of multimeter in wire 38/518 and black lead to ground.
Turn MASTER switch on and check for voltage. Turn
MASTER switch OFF. If voltage is present, replace 15
A circuit breaker (see paragraph 6-9). If voltage is
not present, repair/replace wire 38 from pin A to 15 A
circuit breaker (see paragraph 6-9).
Remove three screws (4), three lockwashers (5),
ground wire (6), and flat washer (7) and release main
switch panel (8) 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 H.