[csvencer]

Now I know this is probably a dumb Q but I have never found the answer.

For bilge pump wiring there is always the auto-off-on switch with the three wires going back to the pump but why? I always run 12V hot to the float then to the pump, then ground the pump and also run the hot to a bilge switch on the dash. Gives me full time auto and manual override. Is there something I am missing? If I put in one of those auto-off-on switches what happens when the bilge fills and the switch is in off? And then what about auto? I just don't get it...

-Svence