I have a GFS Lil Killer. It's a 10k single coil-size dual rail humbucker. It basically looks like an old style Hot Rails for Strat with silver rails instead of black.
Anyway, I wanted to wire it in parallel to brighten it up a little. When I asked GFS for the wiring instructions for that, I was sent this:
I thought Jay designed the pickups. If he does, wouldn't he know how to wire it for parallel? Okay, if any of you know who to wire their humbuckers in parallel, please share. I would appreciate it."I do not have a schematic for parallel wiring- Just not something we get asked a lot."
I have included a diagram of how I believe it should be done. Their green wire is normally hot and black/bare are normally ground. Like Duncan, the red/white are soldered together. I made my best guess.