Filtertron Wiring Diagram. Web black top filter’tron humbucking pickups. Just looking for some help with a diagram/schematic for wiring. 2 Pickup Custom Designed Guitar Wiring Diagrams from guitarelectronics.com For wiring diagrams, click here. Web i need a wiring diagram to solder a seymour duncan pearly gate (4 wires,. With complete wiring harness, and pickup.