fist things first - what type of switch are you using. Is it a gibson style toggle switch or a fender style blade switch?
here is aquick diagram with the fender style switch;

I have done it with BKP colour code, the red wire is the hot one and goes to the volume - then to the switch.
The green wire on the humbucker will be the green and white coil tap wire.
All the black wires go to ground/earth.
thats one way of doing it anyway