I have a bilge switch with a 3 way switch, manual/auto/off. It also has an alarm. Does anyone have a wiring diagram for something like this or know how it hooks up. By the way the pump has a built in float and has 3 wires coming from it.

The auto wire will be marked it goes directly to the battery or the always hot side of battery switch. It needs a fuse to protect it. The manual wire goes to the dash switch. The alarm may be separate. If it is not it would be connected to the wire between dash switch and pump. Thing is it will go on every time pump is on. A high water alarm would be a separate circuit.