# Two humbuckers with a three-way blade and two push/pull split volumes Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-two-push-pull-split-volumes Two humbuckers · Three-way blade · Two push/pull volumes (one split per pickup) Neck and bridge Seymour Duncan humbuckers, each with its own 500k push/pull volume before a three-way blade, and no tone control. Each volume's push/pull switch grounds its own pickup's red–white coil link, so each humbucker can be split to a single coil on its own. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-two-push-pull-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 (unlabelled, marked Seymour Duncan); compatible example (CRL 3-Way Blade) - Neck Volume 500k push/pull: Neck Volume 500k push/pull; 500k; compatible example (500k Push-Pull DPDT) - Bridge Volume 500k push/pull: Bridge Volume 500k push/pull; 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. - On each pickup, the red and white leads are soldered together onto the middle lug of the switch's bottom row, not taped off. - The bottom-row lug nearest the pot has a short wire to that pot's lower solder spot; the pickup's green and bare leads end on the same solder spot. The other switch lugs are drawn empty. - Each volume's middle lug runs to a blade common: neck to the first lug of the right row, bridge to the fourth lug of the left row. - Three short jumpers join the first and second left blade lugs and the third and fourth right blade lugs; the fourth right lug runs to the jack tip. - A wire runs from the neck volume's lower solder spot to the bridge volume's lower solder spot; the bridge ground wire and the jack sleeve also end there. - The neck volume's blade wire carries a hop over the neck black lead; the bridge black lead carries a hop over the bridge volume's blade wire and over the ground wire between the pots. - 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 volume casing (wire, green): Ends on the lower solder spot. 2. Neck bare shield → Neck volume casing (shield, bare): Drawn grey beside the green. 3. Neck split switch lug nearest the pot → Neck volume casing (case, black): Short wire to the lower solder spot. 4. Neck volume top lug → Neck volume casing (case): Under the upper solder spot. 5. Bridge green → Bridge volume casing (wire, green): Ends on the lower solder spot. 6. Bridge bare shield → Bridge volume casing (shield, bare): Drawn grey beside the green. 7. Bridge split switch lug nearest the pot → Bridge volume casing (case, black): Short wire to the lower solder spot. 8. Bridge volume top lug → Bridge volume casing (case): Under the upper solder spot. 9. Neck volume casing → Bridge volume casing (case, black): Runs from the neck lower solder spot down to the bridge lower solder spot. 10. Bridge ground wire → Bridge volume casing (wire, black) 11. Bridge volume casing → Jack sleeve (wire, black) 12. Neck volume middle lug → Blade neck common (wire, black): Carries a hop over the neck black lead. 13. Bridge volume middle lug → Blade bridge common (wire, black) 14. Blade left row, first lug → Blade left row, second lug (wire, black) 15. Blade left row, second lug → Blade right row, third lug (wire, black): Drawn diagonally across the blade. 16. Blade right row, third lug → Blade right row, fourth lug (wire, black) 17. Blade right row, fourth lug → Jack tip (wire, black) 18. Neck red → Neck split switch middle lug (wire, red) 19. Neck white → Neck split switch middle lug (wire, white): Shares the lug with the neck red. 20. Neck black → Neck volume bottom lug (input) (wire, black) 21. Bridge red → Bridge split switch middle lug (wire, red) 22. Bridge white → Bridge split switch middle lug (wire, white): Shares the lug with the bridge red. 23. Bridge black → Bridge volume bottom lug (input) (wire, black): Carries hops over the ground wire between the pots and over the bridge volume's blade wire. ## What each position does - Neck, both knobs down: Neck Pickup (both coils). - Both, both knobs down: Neck Pickup (both coils) and Bridge Pickup (both coils) in parallel. - Bridge, both knobs down: Bridge Pickup (both coils). - Neck, neck knob pulled, bridge knob down: Neck Pickup (split to one coil). Source: Pulling a volume splits that pickup. - Both, neck knob pulled, bridge knob down: Neck Pickup (split to one coil) and Bridge Pickup (both coils) in parallel. Source: Pulling a volume splits that pickup. - Bridge, neck knob pulled, bridge knob down: Bridge Pickup (both coils). - Neck, neck knob down, bridge knob pulled: Neck Pickup (both coils). - Both, neck knob down, bridge knob pulled: Neck Pickup (both coils) and Bridge Pickup (split to one coil) in parallel. Source: Pulling a volume splits that pickup. - Bridge, neck knob down, bridge knob pulled: Bridge Pickup (split to one coil). Source: Pulling a volume splits that pickup. - Neck, both knobs pulled: Neck Pickup (split to one coil). Source: Pulling a volume splits that pickup. - Both, both knobs pulled: Neck Pickup (split to one coil) and Bridge Pickup (split to one coil) in parallel. Source: Pulling a volume splits that pickup. - Bridge, both knobs pulled: Bridge Pickup (split to one coil). Source: Pulling a volume splits that pickup. - 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 - Both knobs down: in each blade position the meter across the jack reads the selected humbucker, or both in parallel in the middle. - Pulling a volume drops its own pickup's reading to roughly one coil's resistance and leaves the other pickup unchanged. - With a volume at zero, its blade common reads as a short to ground. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 2H\_3B\_2VppSPL, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().