How many switches do you have? If more then one you probably have a latching device and the switches just sends a ground signal to the latching device to open and close it.
On my 2002 Windsor I have 4 switch. The latching device is mounted next to the pump and it will control the on/off of the pump. I actually have a relay also as the pump pulls quite a bit of power so they ran a separate power feed and the latching device controls the pump.
I also have a fuse for the water pump in my 12 volt fuse panel PLUS another inline fuse at the water pump itself.
Here is what the latching device looks like, there is a wiring diagram also.
https://pdxrvwholesale.com/products/...g-00-00145-100