# Two humbuckers with a three-way toggle and a push/pull split volume

Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-toggle-push-pull-split-volume

Two humbuckers · Three-way toggle · One push/pull volume (splits both)

Neck and bridge Seymour Duncan humbuckers on a three-way toggle and one 500k volume. The volume's push/pull switch grounds the red–white coil link of both pickups at once, so pulling the knob turns each humbucker into a single coil.

Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-toggle-push-pull-split-volume.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 Toggle: 3 way toggle (unlabelled); compatible example (Switchcraft 3-Way Toggle)
- Volume 500k push/pull: Volume 500k push/pull Coil 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 says the push/pull coil split switch splits both pickups.
- Each pickup's red and white leads are soldered together onto one middle lug of the switch, not taped off: bridge on the left column, neck on the right.
- The two bottom switch lugs (nearest the pot) are jumpered together and wired to the volume casing; the top row stays empty.
- Both pickups' green and bare leads, the toggle's frame lug, the bridge ground wire and the jack sleeve all end on the volume casing.
- The toggle tags are not labelled in the source, so they are mapped by what each does.

## Connections

1. Neck green → Volume casing (case, green)
2. Neck bare shield → Volume casing (shield, bare): Drawn grey beside the green.
3. Bridge green → Volume casing (case, green)
4. Bridge bare shield → Volume casing (shield, bare): Drawn grey beside the green.
5. Split switch left bottom lug → Volume casing (case, black)
6. Toggle side lug → Volume casing (case, black)
7. Volume right lug → Volume casing (case): Lug bent onto the casing.
8. Volume casing → Jack sleeve (wire, black)
9. Bridge ground wire → Volume casing (wire, black)
10. Neck black → Toggle neck lug (wire, black)
11. Bridge black → Toggle bridge lug (wire, black)
12. Toggle middle lug → Volume left lug (input) (wire, black)
13. Neck red → Split switch right middle lug (wire, red)
14. Neck white → Split switch right middle lug (wire, white): Shares the lug with the neck red.
15. Bridge red → Split switch left middle lug (wire, red)
16. Bridge white → Split switch left middle lug (wire, white): Shares the lug with the bridge red.
17. Split switch right bottom lug → Split switch left bottom lug (wire, black): Short jumper along the bottom row.
18. Volume middle lug → Jack tip (wire, black)

## What each position does

- Neck, knob down: full humbucker: Neck Pickup (both coils).
- Both, 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.
- Both, 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 toggle 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\_3G\_1VppSPL, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan.

See also [all wiring diagrams](<https://guitarwiring.app/wiring-diagrams/index.md>).