SECTION V: TROUBLESHOOTING
TM 9-2350-256-20
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.
B
Reconnect switch panel to gage panel and
miscellaneous switches wiring harness. Disconnect
switch panel, radio, and bilge pump to bulkhead wiring
harness. Place red lead on pin A and black lead to
ground and check for voltage. If voltage is present
repair/replace switch panel, radio, and bilge pump to
bulkhead wiring harness. If voltage is not present,
troubleshoot master relay circuit (see paragraph 2-19,
master relay fails to operate).
C
Reconnect switch panel to gage panel and
miscellaneous switches wiring harness. Disconnect
wire 25/27 from 15 A circuit breaker. Place red lead of
multimeter on terminal of 15 A circuit breaker and
black lead to ground. Turn MASTER switch on and
check for voltage. Turn MASTER switch OFF. If
voltage is present, go to step E. If voltage is not
present, go to step D.
D
Reconnect wire 25/27 to 15 A circuit breaker.
Disconnect wire 10 from 15 A circuit breaker. Place
red lead of multimeter in wire 10 and black lead to
ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is
present, replace circuit breaker (see paragraph 6-10).
If voltage is not present, repair/replace wire 10 of main
lighting and B.O. selector switch wiring harness (see
paragraph 6-69).
2-111