Guitar wiring diagram with 2 humbuckers and 3-way toggle switch with 1 volume and 1 HCP Humbucker Control Pot with optional push/pull switch (on volume pot) for the HCP control to select either coil tap mode or coil filter mode. Ready to start? Don't forget the Wire, Solder, Shielding & Supplies. Copyright© PMT Music Products LLC. Unauthorized use prohibited. Click diagram to view full size.