CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19
ELECTRICAL TROUBLESHOOTING-Continued
FIXED SPOTLIGHT-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.
F
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 G.
G
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 (8), flat washer (7), ground wire (6), three
lockwashers (5), and three screws (4) 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).
2-256