Humbucker Wiring Information
Twin Humbucker Configuration – Coil Splitting With Hum Cancellation
If you split one SD humbucker to the north coil and the other to the south coil they will be hum cancelling – the problem is that both outer coils are normally south, i.e. the screws are located towards the neck on the neck pickup and towards the bridge on the bridge pickup.
Rotating one of the pickups puts the north coil on the outside but *does not* change the polarity!!!
Split to the south (screw) coil by shorting the black to the red/white wires, green is hot.
Split to the north (slug) coil by shorting the green to the red/white wires, black is hot.
Handy article from Seymour Duncan: