I've got a PJ bass with 3 pots. Neck volume, Bridge and tone. The bridge volume is really noisy, it'll squeal when turned and if set just right the bass will actually be playable. I opened it up and it seems as if its one of the wires going from the neck pot to the bridge pot. It is a cold solder or something wrong with the pot? The solder looks okay, although I'm no expert.