Hi folks - I apologize in advance, I'm afraid this is a pretty basic question. I have a small water pump - two wires and a separate switch - very similar to what others have used here - with three leads off the back: two silver, one brass. I assumed that brass was ground. Wired both grounds up to fuse box fine. My mistake might be that I wired the power cable from the pump plus BOTH silver switch leads to the same post in the fuse box. Pump works fine but switch will not shut it off. I know this is basic electricity stuff. Now I'm thinking that perhaps each silver lead ought to have it's own fused post in the fuse box?