I have a 4-string Johnson bass and Ive been trying to fix it for some time now. The Pots are all busted so I have both pickups wired directly to the jack. When I play, if I touch any metal part of the bass, I hear a loud buzzing sound. I'm thinking thats the grounding but I dunno. And I cant seem to find and new sets of Pots for my bass anywhere. Can anybody help me?

I'll take a look at that site. I took my bass apart and concluded that the buzz was coming from the way my friend had it wired. The red and black wires were reversed. I switched the leads and the buzzing MOSTLY went away. Now I just need the electronics, new strings and maybe even a new set of pickups. Where can I find the right kind of pickups?