# Two humbuckers with a three-way blade, a push/pull phase neck volume and a push/pull split bridge volume Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-phase-and-split-volumes Two humbuckers · Three-way blade · Neck volume push/pull (phase) · Bridge volume push/pull (split) · No tone Neck and bridge Seymour Duncan humbuckers, each with its own 500k push/pull volume before a three-way blade, and no tone. The neck volume's push/pull reverses the neck's black and green leads. The bridge volume's push/pull splits the bridge by grounding its red–white link. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-push-pull-phase-and-split-volumes.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) - Neck Volume 500k push/pull phase: Neck Volume 500k push/pull Phase Switch; 500k; compatible example (500k Push-Pull DPDT) - Bridge Volume 500k push/pull split: Bridge Volume 500k push/pull 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 volumes as push/pull coil split and push/pull phase. - The neck red and white leads are soldered together and taped off. - The neck black and green go through the neck volume's push/pull with an X cross-wire; the hot out feeds the neck volume's input lug. - The bridge red and white are soldered together onto the middle lug of the bridge volume's push/pull bottom row; the lug nearest the pot goes to that pot's casing. - Each volume's middle lug runs to a blade common; three short wires join four other lugs into one output to the jack tip. - Solder = location for ground (earth) connections. - The blade tags are not labelled in the source, so they are mapped by what each does. ## Connections 1. Neck green → Neck phase middle right (wire, green) 2. Neck bare → Neck volume casing (shield, bare) 3. Neck phase bottom left → Neck volume casing (case, black) 4. Neck volume right lug → Neck volume casing (case): Lug bent onto the casing. 5. Bridge green → Bridge volume casing (case, green) 6. Bridge bare → Bridge volume casing (shield, bare) 7. Bridge split bottom → Bridge volume casing (case, black) 8. Bridge volume right lug → Bridge volume casing (case): Lug bent onto the casing. 9. Neck volume casing → Bridge volume casing (case, black) 10. Bridge ground wire → Bridge volume casing (wire, black) 11. Bridge volume casing → Jack sleeve (case, black) 12. Neck volume middle lug → Blade neck common (wire, black) 13. Bridge volume middle lug → Blade bridge common (wire, black) 14. Blade lug → Blade lug (wire, black) 15. Blade lug → Blade lug (wire, black) 16. Blade lug → Blade lug (wire, black) 17. Blade output → Jack tip (wire, black) 18. Neck red → Neck white (insulated, red): Taped series link. 19. Neck black → Neck phase middle left (wire, black) 20. Bridge red → Bridge split middle (wire, red) 21. Bridge white → Bridge split middle (wire, white) 22. Bridge black → Bridge volume left lug (input) (wire, black) 23. Neck phase top left → Neck volume left lug (input) (wire, black) 24. Neck phase top left → Neck phase bottom right (wire, black): One leg of the X. 25. Neck phase top right → Neck phase bottom left (wire, black): The other leg of the X. ## What each position does - Neck, both knobs down: Neck Pickup (both coils). - Both, both knobs down: in phase: Neck Pickup (both coils) and Bridge Pickup (both coils) in parallel. - Bridge, both knobs down: Bridge Pickup (both coils). - Neck, phase pulled, bridge down: Neck Pickup (both coils). Source: Neck alone sounds the same when reversed. - Both, phase pulled: out of phase: Neck Pickup (both coils) and Bridge Pickup (both coils) in parallel. Source: Neck reversed against the bridge. - Bridge, phase pulled: Bridge Pickup (both coils). Source: The bridge does not pass through the phase switch. - Neck, phase down, bridge split: Neck Pickup (both coils). - Both, bridge split: Neck Pickup (both coils) and Bridge Pickup (split to one coil) in parallel. Source: Pulling the bridge volume splits the bridge. - Bridge split: Bridge Pickup (split to one coil). Source: Pulling the bridge volume splits the bridge. - Neck, phase and split pulled: Neck Pickup (both coils). Source: Neck alone sounds the same when reversed; bridge split does not affect it. - Both, phase and split pulled: Neck Pickup (both coils) and Bridge Pickup (split to one coil) in parallel. Source: Neck reversed; bridge split. - Bridge, phase and split pulled: Bridge Pickup (split to one coil). Source: Bridge split; phase switch does not affect the bridge. - 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. ## Check before plugging in - In each blade position the jack should read the selected pickup, or both in parallel in the middle. - Bridge volume pulled: the bridge red–white link should read continuity to ground. - Neck volume pulled in the middle position: the two pickups should be out of phase. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 2H\_3B\_2VppSPLppPH, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().