Bilge Pump Auto Switch

[fairwinds]

Can anyone provide a better wire diagram of the bilge pump circuit than what the owners book shows? My pump will not operate in auto mode. I replaced the float switch, but still no. I've attempted to trace the wires, but I lose them in a harness. Any ideas would be greatly appreciated.

[Ted Pounds]

My bilge pump control switch is located on the ledge below the fold out counter top next to the galley sink.  I think it was put ther by PO but it's a good spot as the wire runs are short (right from there to battery) and easy to follow.  You might consider just re-wiring if you can't find the problem.  If the wires go into a harness you should dig them out of the harness.  There's probably corrosion at some connector in there.  If so, again, your best bet would be to rewire the whole thing with marine grade, tinned wire, using as few connections as possible right to the battery with a fuse holder just off the positive terminal.  Might also be a bad control switch.   If you've got a continuity tester or a VOM you can check that out.  Good Luck.

Ted

[Stu Jackson]

The easiest way to get a wiring diagram is go to a marine store and look at the back of a manual bilg pump switch package.  It'll show you all you need to know.  Then you need to trace the wires on your own boat.

[dboehmer]

I had the same problem on my "88" and replaced the switch to noavail. Come to find out. It was the fuse.....(should have check that first I know) between the switch and breaker. Oh well, now I have a new switch.

[rirvine]

I have found that before replacing anything, it is always wise to chase down the circuit with a voltmeter. It is amazing how many times you find either a blown fuse, or a loose connection, or some other simple problem.  It also gives you a good understanding of which piece is broken should that be the case.o

[fairwinds]

Thank you all for the input. Armed with a multi meter, new switch, wires, connectors and fuse holder I tackled the job. Low & behold, 12" into the harness I found a wire broken in it's insulation. Problem solved! :)