# Two humbuckers with a three-way blade and a push/pull coil split Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-coil-split Two humbuckers · Three-way blade · Push/pull volume · No tone Neck and bridge Seymour Duncan humbuckers on a three-way blade with one 500k push/pull volume and no tone. The push/pull splits both pickups at once by grounding each pickup's red–white link. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-coil-split.svg (back of controls) ## Parts and values - Neck Pickup: Seymour Duncan Neck Pickup; generic (Humbucker (four-conductor, Seymour Duncan colours)) - Bridge Pickup: Seymour Duncan Bridge Pickup; generic (Humbucker (four-conductor, Seymour Duncan colours)) - 3-Way Blade Switch: 3 Way Blade; compatible example (CRL 3-Way Blade) - Volume 500k push/pull split: Volume 500k with Split Switch; 500k; compatible example (500k Push-Pull DPDT) - Output Jack: Output Jack; compatible example (Switchcraft \#11) - Bridge ground: Bridge ground wire; generic (Bridge ground wire) ## Specific to this wiring - The source titles the push/pull as a coil split switch that splits both pickups. - Each pickup's red and white leads are soldered together onto a middle lug of the push/pull switch: bridge on the left, neck on the right. They are not taped off. - The two push/pull lugs nearest the pot are jumpered together and wired to the volume casing; the two lugs furthest from the pot stay empty. - Each pickup's black lead goes to a common lug on the blade; three short jumpers join four other lugs into one output that loops round to the volume's input lug. - The bridge ground wire and the jack sleeve both end on the volume casing. - The source legend marks the grey 'Solder' spots as the location for ground (earth) connections. - The source does not number the blade positions; the lugs are mapped by what they do (neck, both, bridge). ## Connections 1. Neck green → Volume casing (case, green) 2. Neck bare → Volume casing (shield, bare): Drawn grey beside the green. 3. Bridge green → Volume casing (case, green) 4. Bridge bare → Volume casing (shield, bare): Drawn grey beside the green. 5. Push/pull bottom left lug → Volume casing (case, black) 6. Volume right lug → Volume casing (case): Lug bent onto the lower solder spot. 7. Volume casing → Jack sleeve (wire, black) 8. Bridge ground wire → Volume casing (shield, black) 9. Neck black → Blade top row, first lug (common) (wire, black) 10. Bridge black → Blade bottom row, fourth lug (common) (wire, black) 11. Blade bottom row, first lug → Blade bottom row, second lug (bridge, black) 12. Blade bottom row, second lug → Blade top row, third lug (bridge, black) 13. Blade top row, third lug → Blade top row, fourth lug (bridge, black) 14. Blade top row, fourth lug → Volume left lug (input) (wire, black) 15. Neck white → Push/pull middle right lug (wire, white) 16. Neck red → Push/pull middle right lug (wire, red): Shares the lug with the neck white lead. 17. Bridge white → Push/pull middle left lug (wire, white) 18. Bridge red → Push/pull middle left lug (wire, red): Shares the lug with the bridge white lead. 19. Push/pull bottom left lug → Push/pull bottom right lug (bridge, black) 20. Volume middle lug → Jack tip (wire, black) ## What each position does - Neck, knob down: full humbucker: Neck Pickup (both coils). - Neck + bridge, knob down: both humbuckers: Neck Pickup (both coils) and Bridge Pickup (both coils) in parallel. - Bridge, knob down: full humbucker: Bridge Pickup (both coils). - Neck, knob pulled: single coil: Neck Pickup (split to one coil). Source: The split switch splits both pickups. - Neck + bridge, knob pulled: both split: Neck Pickup (split to one coil) and Bridge Pickup (split to one coil) in parallel. Source: The split switch splits both pickups. - Bridge, knob pulled: single coil: Bridge Pickup (split to one coil). Source: The split switch splits both pickups. - Hum cancelling and phase describe the generic pickup models, not a measurement of any specific Seymour Duncan model. - Pickup resistance is not specified, so no numeric meter readings are given. - The source does not say which knob position splits; this follows the usual push/pull behaviour (pulled joins the middle lugs to the lugs nearest the pot). ## Check before plugging in - Knob down: in each blade position the meter across the jack reads the selected humbucker, or both in parallel in the middle. - Knob up: each reading drops to roughly one coil's resistance. - With the volume at zero, tip and sleeve should read as a short in every position. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 2H\_3B\_1VppSPL, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().