How can I fix it? Im thinking its the imput jack....but Ive soldered (spelling?) is in and out, yet it still buzzes.

any help?
well on guitars strat style bridges, a wire comes from the front through to the back of the guitar (form pup cavity to rear bridge cavity) and is the solderd onto the bridge, so without knowing the make of your bass i cant tell you if its the same, but its almost guaranteed theat they will have soldered the ground to the bridge somehow so look for the wire.
Well I beat you all!

When I use my red venom lead, my bass electrocutes me!
RHCP Fanatic! Fish Bass