This site, I think, is best and most complete guitar wiring diagram site. Here you will detail tutorial, description, explanation complete with illustration of related guitar wiring diagram being discussed. This site discussing guitar wiring diagram in 6 pages. The first page contains explanation about guitar volume and tone controls wiring diagrams (Fender and Gibson), Single Pole Double Throw (SPDT) switch diagram which consists of SPDT center on switch and SPDT center off switch, 3 single coils wired in parallel and series wiring diagram, Humbuckers wiring diagram, Dimarzio Pickup wire colors, Seymour Duncan wire colors, phase reversal switch diagram.