New Bilge Pump

[MLA]

Stand alone floats are typically only 2 wires, no ground. Battery B+ in, then out when water raises the float.

[williamsatown]

Do you just cap the second ground wire that was with the original float?


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[MLA]

The old float B+ goes to the new pump brown

Old pump brown goes to new pump brown/wht

black to black

[MLA]

The old float B+ goes to the new pump brown

Old pump brown goes to new pump brown/wht

black to black

[williamsatown]

I had the same issue.

I went with the manual Rule pump and the float switch. That way I didn’t have to change the wiring. I actually completed that change out about an hour ago.

Let me know how you fixed your wiring if you made the change to the three wire. Just curious





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[Shawnymac11]

I've dug deep into archives and found great information on replacing the original bilge pump. I have not found the exact answer on the wiring.

Old yellow/black mayfair pump had brown/black wires
Old Float switch had two grey wires

How do I connect the new Rule pump that has a built in float?
Rule Pump has:
Brown Wire-Automatic
Brown w/ white stripe-Manual Override
Black- the negative wire

I just can't figure out how to go from (factory) 4 wires coming from the dash, to three wires at the new pump. Any help would be appreciated.