CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONS
TM 9-2350-256-20
2-19 ELECTRICAL TROUBLESHOOTING-Continued
BILGE PUMP SYSTEM AND ELECTRICAL ACCESSORIES PANEL POWER
OUTLET-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.
M Disconnect wire 451A from bilge pump relay side of
50 A circuit breaker. Place red lead of multimeter
on 50 A circuit breaker terminal and black lead to
ground. Turn MASTER switch on and check for
voltage. Turn MASTER switch OFF. If voltage is
present, repair/replace wire 451A of bilge pump
lead relay wiring harness (see paragraph 6-86). If
voltage is not present, go to step N.
N Reconnect wire 451A to bilge pump relay side of 50
A circuit breaker. Disconnect wire 450A from
electrical accessories panel side of 50 A circuit
breaker. Place red lead of multimeter in wire 450A
and black lead to ground. Turn MASTER switch on
and check for voltage. Turn MASTER switch OFF.
If voltage is present, replace 50 A circuit breaker
(see paragraph 6-85). If voltage is not present,
repair/replace bilge pump circuit breaker to switch
panel lead wire 450A (see paragraph 6-85).
O Place jumper wires from pin A to socket A and pin B
to socket B. Place red lead of multimeter on pin C of
wire 451B of bilge pump relay and black lead to
ground. Turn MASTER and BILGE PUMP switches
ON and check for voltage. Turn MASTER and
BILGE PUMP switches OFF. If voltage is present,
go to step P. If voltage is not present,
repair/replace bilge pump relay (see paragraph
6-101).
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