BeZo":cwgln1r9 said:
P would prolly be hot.
E would prolly be ground.
C would prolly be the coils.
They prolly just ran the coils into each other and attached one wire to ground it out to cut out a coil to coil-tap.
Most new pickups have 4 wires so that you can do custom phasing. The wires for the out on one coil and the in of the other would almost always be wired together, unless you wanted to do some crazy shit with phasing. That way you have a hot, a ground (plus the shield), and the coil tap (2 wires attached together that can be drawn to ground to coil tap).
I was just guessing on their diagram. You can find others from pickup companys themselves if you want more help.
The existing pickups are tapped, but in the diagram, instead of the two wires that normally would be connected together going to the middle lug of the switch on the push-pull pot, it shows one wire going to the middle lug and one to the lug closest to the pot (which I thought would have gone to ground). This is where I'm getting confused.