I'd mentioned that I'm fighting the battle of the bilge pumps too... I'm sure I've got a pair of dead floating switches but haven't gotten around to change them yet. I also have this weird deal where my two position dash switches light up when I switch them on, but when I complete the circuit, the test light doesn't light and the light on the switches go out. If I switch the switches off and back on they light up again until I complete the curcuit. No power to the back though.
I should disclose that I have a long and checkered history with vehicular electrics dating back to the time I tried to chase a short in the dash of my '69 Triumph GT6+ and found that the ENTIRE harness had been wired with green wire. Not painted, but all green wiring... Ah good old english labor unrest...
Anyhow, I do currently have it rigged up so that I can plug in a couple of blade type connectors from the battery to the power on the pumps and get them to run if I need it, plus I've got a pretty boss hand pump from West Marine...