CHAPTER 2: VEHICLE MAINTENANCE INSTRUCTIONSTM 9-2350-256-202-19 ELECTRICAL TROUBLESHOOTING-ContinuedBILGE PUMP SYSTEM AND ELECTRICAL ACCESSORIES PANEL POWEROUTLET-ContinuedWARNINGRemove all jewelry such as rings, dog tags ,bracelets, etc. If jewelry contacts a metalsurface a direct short may result in instantheating of tools, damage to equipment, andinjury or death to personnel.M Disconnect wire 451A from bilge pump relay side of50 A circuit breaker. Place red lead of multimeteron 50 A circuit breaker terminal and black lead toground. Turn MASTER switch on and check forvoltage. Turn MASTER switch OFF. If voltage ispresent, repair/replace wire 451A of bilge pumplead relay wiring harness (see paragraph 6-86). Ifvoltage is not present, go to step N.N Reconnect wire 451A to bilge pump relay side of 50A circuit breaker. Disconnect wire 450A fromelectrical accessories panel side of 50 A circuitbreaker. Place red lead of multimeter in wire 450Aand black lead to ground. Turn MASTER switch onand 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 switchpanel lead wire 450A (see paragraph 6-85).O Place jumper wires from pin A to socket A and pin Bto socket B. Place red lead of multimeter on pin C ofwire 451B of bilge pump relay and black lead toground. Turn MASTER and BILGE PUMP switchesON and check for voltage. Turn MASTER andBILGE PUMP switches OFF. If voltage is present,go to step P. If voltage is not present,repair/replace bilge pump relay (see paragraph6-101).2-230
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