http://www.nordstrandpickups.com/faq-support/
All stack pickups - the white is hot, the black is ground, and the red is the tap. This means to run the pickup in single coil mode you need to short the red wire to ground and this can be done easily with a switch. For normal hum cancelling mode just leave the red wire taped off and not connected to anything. If there is a gray wire, see below. Here's a diagram for switching the stacks to single coil mode.
Where does the gray wire go? The gray wire is for grounding the pole pieces. In an installation with a buffered preamp (Audere, East) where the common out on the pickup needs to be separate from the system ground the gray wire will be ultimately connected to the sleeve on the jack. This can happen by connecting it to shielding foil, the bridge ground point, or the appropriate connection on the preamp. On a non buffered preamp, which is pretty much everything else, or a passive installation, the gray wire can simply be tied into the black wire and connected exactly where the black wire is connected.
http://www.nordstrandpickups.com/faq...-Switching.jpg
Topeka broken?
Please and thank you.
