The 920D Groove P-Bass pickup is easily one of the worst experiences I've ever had installing any pickup, hands down. First of all, no documentation whatsoever aside from how to wire the pots. No color coding or anything, meaning I had to sit with a multimeter for over an hour to figure it out. Not only that, each coil is separated, with a four-conductor wire for each coil. A stacked noiseless coil for what is a noiseless pickup by nature? Why? If you guys wanted to add an option for going from a higher output to more vintage, why not just make a true coil tap rather than a stacked coil? So much work for an average hottest P-Bass pickup. Simply not worth it.
Oh, and to save people time:
Black Coil
Red: To the Pot
Green and White: Solder Together (Series)
Black: Solder to Grey Coil's Red Wire (Also Series)
Grey Coil
Red: Solder to Black Coil's Black Wire
Green and White: Solder Together (Series)
Black: To Pot Casing with Bare Wires