"Woody57".....If you have multiple water pump switches in your coach and they are momentary switches (push them and they snap back), you have a latching controller that looks like this.....
Again, if you have what I've described, your water pump is wired a little differently than you would expect. The hot side (+) of the water pump is wired to power all the time. The negative side (-) is connected to the controller. When you push a water pump switch, it momentarily connects to ground and connects the ground on the water pump.
To check for a controller failure, take a volt meter and check the hot lead (red wire) at the pump, it should show 12 volts. If it does, your controller is most likely bad. The quick fix, in an emergency, is just run a ground wire to the water pump. This will get you going until you replace the controller.
Intellitec makes the controller and is available on Amazon. I carry a spare.