Wiring Swith for Fresh Water Pump

[keifermj]

I'm sure this pretty simple to do, but I am not great at wiring. Anyway, last year I bought a 1999 Four Winns Sundowner that has a sink in the cuddy. I had the boat in the shop and I asked them how to use the sink because I couldn't get it to work. I guess there are two problems. The first is that the pump is bad so I ordered a new one and can swap that out myself. The second is that I guess the accessory switch on the dash was meant to be used to pressure the system, but has since been disconnected so that the switch could be used for the radio. I would like to add a switch to be used for the pump. I see that there is a black wire and and orange/black wire. The black wire is connected to the bus bar and the orange/black wire is hanging. If I add a switch can you tell me where the orange/black wire goes? Is there a wire that should go back to the fuse block? Any advise would be much appreciated. Thanks.

 

[Silvertip]

Re: Wiring Swith for Fresh Water Pump

Any water system needs a couple of things. 1) a pump, 2) a swich to arm the system, and 3) a pressure switch. There are obviously variations on this system but here is how this one works.
1) The arming switch applies power to the system.
2) The pressure switch turns on when there is little or no pressure in the water system. It turns on the pump.
3) The pump either pressurizes the water system pressure tank (separate from the water holding tank) or it simply pressurizes the water supply liines. You turn on the tap and the pressure drops. The pressure switch turns on, the pump starts and you have water.
4) You turn the tap off, pressure builds up, the pressure switch turns off the pump.

So you need to determine what system you have before you start connecting switches and wiring. Switches require +12 volts INTO one terminal on the switch (thats the LINE side). The other terminal is the OUTPUT (the LOAD) side that goes to the water system. That may be the pressure switch in this example. The outpt side of the pressure switch goes to the pump.