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Bilge pump wiring

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Topic author United States of America
Twobuoys
Scurvy Dog
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Joined: March 25th, 2025, 6:04 pm
Vessel Info: 1988 3257 sedan mercruiser 5.7 power
Location: Hampton Beach NH

Bilge pump wiring

Postby Twobuoys » March 25th, 2025, 6:45 pm

I just purchased a 3257 1988 carver Montego sedan I’m trying to fix wiring problems. The switch panel indicates two bilge pumps. However, there are three bilge pumps, the aft bilge pump and the mid cabin bilge pump both work as designed the forward bilge pump has two wires, and there is no power Have a good ground wire but the positive wire is dead I’m trying to figure out where it goes. Any suggestions? Thank you.

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Carverlvr2
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Vessel Info: 2004 Carver 366, VP 8.1’s
1992 Carver 33, Crusader 7.4’s
1979 Searay Sundancer 260
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Re: Bilge pump wiring

Postby Carverlvr2 » March 25th, 2025, 7:05 pm

Power for bilge pumps should always come from the batteries with a breaker in between. My bilge breakers are under a step. Make sure those are all on first. Then trace back to the pump from there.

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Re: Bilge pump wiring

Postby Viper » March 25th, 2025, 7:38 pm

Welcome aboard. Does your forward bilge pump come on when the mid cabin pump is powered up? They might be on the same circuit. I've seen them hooked up this way before.
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Topic author United States of America
Twobuoys
Scurvy Dog
Scurvy Dog
Posts: 3
Joined: March 25th, 2025, 6:04 pm
Vessel Info: 1988 3257 sedan mercruiser 5.7 power
Location: Hampton Beach NH

Re: Bilge pump wiring

Postby Twobuoys » March 28th, 2025, 12:51 pm

Thanks for getting back turns out the forward pump is a stand alone has no switch and runs straight from main battery breaker found a push button breaker in the back of a locker under the helm seat reseat the breaker easy peasy works now

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Vessel Info: 1989 Carver 3807 Aft Cabin
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Re: Bilge pump wiring

Postby Viper » March 28th, 2025, 5:40 pm

Glad you solved the problem. Is that pump hooked up to a float switch?
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Topic author United States of America
Twobuoys
Scurvy Dog
Scurvy Dog
Posts: 3
Joined: March 25th, 2025, 6:04 pm
Vessel Info: 1988 3257 sedan mercruiser 5.7 power
Location: Hampton Beach NH

Re: Bilge pump wiring

Postby Twobuoys » March 28th, 2025, 6:50 pm

Yes new pump new foot switch

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