Hey, I have a cheap Washburn xb100 I converted to fretless, and am slowly upgrading. I had been having problems with the output jack cutting out, so I decided to replace it. I resoldered a new jack on, but I didn't really pay all that much attention to which wire went where on the lugs (stupid I know, but I just guessed!
) Anyway, I now get sound all the time, but it hums like crazy! The only time it doesn't hum is with the volume all the way on and the tone all the way off. Moving either of these knobs from these positions results in crazy amounts of hum. Seems like this a grounding problem. I also swapped the bridge recently, but I checked the bridge ground and it seems fine. The hum subsides if I touch the head of the cable or the jack plate. Touching the bridge doesn't help. If I connect a instrument cable from the bridge to the jackplate (don't ask why), all of the sound will cut out, including the hum. I figuire this is being caused by a bad ground on the output jack, but the connection looks fine. I really don't know where to start diagnosing the problem. I don't own a multimeter or one of those fancy-doohickey tools. Thanks in advance!
