Hey there. What I have gone and done is purchased a brand new G&L MFD bass pickup and wiring harness to make one of my basses like an L-1500. The wiring harness is the standard design for an L-2000. My housemate has done some wiring work on guitar, but nothing this intricate (He's used to simple passive or EMG) and gave it a good go, but he's not sure where it went wrong. The problems: Volume drop out Signal distorting Signal VERY underpowered Low tone for a hot pickup. We figure it is something very simple, but just out of reach of our knowledge. But that's sometimes the risk of experimentation! He based everything from a hand-drawn diagram of L-1500 wiring and the 'official' diagram for the L-2000 and may become unstuck from there. Anyone who has had experience with this kind of wiring and this kind of signal malfunction, your advice would be GREATLY appreciated! Cheers!