[bobbecky]

I don't believe this was mentioned, and I'm not familiar with your rig's valves, but do you have a tank fill valve, where you can fill your fresh tank from the city water connection just by turning the tank fill valve? If so, and it's turned to the fill position, you will have a hard time getting the pump to work and also to stop the pump from running. It needs to be in the normal position when not filling the tank.