CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING--Continued
GAGE PANEL LIGHTS-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.
J
Reconnect main lighting and master relay wiring
harness to main lighting switch. Disconnect wire
10 of main lighting and B.O. selector switch
wiring harness from wire 15 of main lighting and
master relay wiring harness. Place red lead of
multimeter in wire 10 and black to ground. Turn
MASTER switch on and check for voltage. Turn
MASTER switch OFF. If voltage is present,
repair/replace wire 15 of main lighting and master
relay wiring harness (see paragraph 6-70). If
voltage is not present, repair/replace wire 10 of
main lighting and B.O. selector switch wiring
harness (see paragraph 6-69).
K
Reconnect switch panel to gage panel and
miscellaneous switches wiring harness to main
switch panel. Install main switch panel (11), flat
washer (10), ground lead (9), three lockwashers
(8), and three screws (7) to mounting brackets.
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).
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