Here's the message I sent to the Seymour Duncan inquiry. I was wondering if someone could look at what I've done as well and tell me if they can see some mistakes. I'm putting the Musicman Replacements Pick and Preamp in a Ernie Ball Sterling. I can't get it to work. Here's what I've done. 1)I twisted the red and black wires from pickup and soldered them to the gray wire from preamp. 2) I twisted the white, green, and plain/silver wires from the pickup together and soldered it to the terminal in the control cavity that is screwed to the side of the control cavity 3)I desoldered the battery clip wires and soldered the wire on the existing battery compartment so that the black wire connects with the part that touches the negative part of the 9 volt battery and the red wire goes to the part that touches the positive part of the 9 volt battery. The rest of the wire I have left untouched. There is also another wire that comes from the battery compartment area that isn't attached to the battery. I assume this is a ground that is supposed to be soldered to the input jack, but which terminal? By the way, I'm using the tone circuit with 3 knobs instead of 4 knobs. Am I doing something wrong? Have I possibly screwed up the battery wiring? Any mistakes? Here's the wiring diagrams for the 4 knobs/4 pot pre and p-up http://www.seymourduncan.com/support/schematics/music_man.html Thanks for the help!