can anyone help? I have a Rickenbacker 4001 bass. The bass pickup works fine, both volume and tone. But the treble pickup is behaving strangely. The volume control has no affect at all, and it's tone control is acting like a volume control (with tone full on), and the output is very low. The tone control will only work with the volume control up full. I downloaded the schematic for the bass from Rickenbacker's website, and replaced all the bass's wiring, following the diagram to the letter. Still no change. I replaced the volume pot with a new one. Still no change. I replaced the tone pot with a new one - STILL no change. I removed the treble pickup from the bass, and wired up a new set of pots and capacitor and independant jack socket, using a standard Fender Precision bass diagram - and the same problem still persists. Can anyone offer me any advice on what is wrong with this pickup, and what to do to get it working properly?