# Three humbuckers with a three-way toggle, three volumes and one tone Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/three-humbuckers-toggle-three-volumes-tone Three humbuckers · Three-way toggle · Three volumes · One master tone Neck, middle and bridge Seymour Duncan humbuckers, each with its own 500k volume. The toggle picks neck, both or bridge; the middle pickup's volume sits on the output line, so the middle pickup is on in every toggle position. One 500k master tone with a .047 µF capacitor. The red and white leads on each pickup are joined and taped off. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/three-humbuckers-toggle-three-volumes-tone.svg (back of controls) ## Parts and values - Neck pickup: Seymour Duncan Neck Pickup; generic (Humbucker (four-conductor, Seymour Duncan colours)) - Middle pickup: Seymour Duncan Middle 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) - Bridge volume 500k: 500k Bridge Volume; 500k; compatible example (CTS 500k Audio Pot) - Neck volume 500k: 500k Neck Volume; 500k; compatible example (CTS 500k Audio Pot) - Middle volume 500k: 500k Middle Volume; 500k; compatible example (CTS 500k Audio Pot) - Master tone 500k: 500k Master Tone; 500k; compatible example (CTS 500k Audio Pot) - .047 cap: .047 cap (drawn green); 47nF; compatible example (Orange Drop .047µF) - Output jack: Output Jack; compatible example (Switchcraft \#11) - Bridge ground: Bridge Ground Wire; generic (Bridge ground wire) ## Specific to this wiring - Sheet title: 3 humbuckers \| 3 volumes, 1 tone \| 3 way toggle. - Red & White wires get soldered together and taped off (printed once, applies to the taped sleeve on each pickup). - On every volume the pickup's black lead goes to the middle lug and the right lug is drawn bent back onto the casing; the left lug is the volume's output. - The bridge volume's left lug feeds the toggle's left lower lug and the neck volume's left lug feeds the toggle's right lower lug. The toggle's middle lug goes to the tone's middle lug and on to the middle volume's left lug, which also goes to the jack tip. So the middle pickup is on in every toggle position; this is read from the drawn wiring, as the sheet prints no position legend. - The .047 cap sits between the tone's left lug (tone drawn lugs up) and the tone's Solder spot. The tone's third lug is not connected. - Ground chain as drawn: toggle top lug to the bridge volume Solder spot, bridge volume casing to tone casing, tone casing to the middle volume's upper Solder spot, middle volume casing to neck volume casing. The jack Sleeve and the Bridge Ground Wire both end on the tone Solder spot. - The toggle tags are not labelled in the source, so they are mapped by function. - Source legend: the grey 'Solder' spot = location for ground (earth) connections. - Tip (hot output). Sleeve (ground): the inner, circular portion of the jack. ## Connections 1. Neck green → Neck volume casing (case, green) 2. Neck bare shield → Neck volume casing (shield, bare): Drawn grey beside the green. 3. Neck volume right lug → Neck volume casing (case): Lug bent onto the casing. 4. Middle green → Middle volume casing (case, green) 5. Middle bare shield → Middle volume casing (shield, bare): Drawn grey beside the green. 6. Middle volume right lug → Middle volume casing (case): Lug bent onto the casing. 7. Bridge green → Bridge volume casing (case, green) 8. Bridge bare shield → Bridge volume casing (shield, bare): Drawn grey beside the green. 9. Bridge volume right lug → Bridge volume casing (case): Lug bent onto the casing. 10. Toggle top lug → Bridge volume casing (case, black) 11. .047 cap → Tone casing (case) 12. Bridge volume casing → Tone casing (case, black) 13. Tone casing → Middle volume casing (case, black): Hops the tone-to-middle-volume signal wire. 14. Middle volume casing → Neck volume casing (case, black): The neck black lead hops over it. 15. Tone casing → Jack sleeve (wire, black) 16. Bridge ground wire → Tone casing (shield, black) 17. Bridge volume left lug → Toggle bridge lug (wire, black): Hops the vertical ground wire. 18. Neck volume left lug → Toggle neck lug (wire, black) 19. Toggle middle lug → Tone middle lug (wire, black): Hops the vertical ground wire. 20. Neck red → Neck white (insulated, red): Soldered together and taped off. 21. Neck black → Neck volume middle lug (wire, black) 22. Middle red → Middle white (insulated, red): Soldered together and taped off. 23. Middle black → Middle volume middle lug (wire, black) 24. Bridge red → Bridge white (insulated, red): Soldered together and taped off. 25. Bridge black → Bridge volume middle lug (wire, black) 26. Tone middle lug → Middle volume left lug (wire, black): Hops the vertical ground wire. 27. Middle volume left lug → Jack tip (wire, black) 28. Tone left lug → .047 cap (wire) ## What each position does - Neck + middle: Neck pickup (both coils) and Middle pickup (both coils) in parallel. Source: Read from the drawn wiring: the bridge volume feeds the toggle's left lower lug, the neck volume its right lower lug, and the toggle's middle lug joins the middle volume's output lug, which goes to the jack tip. The sheet prints no position legend. - Neck + middle + bridge: Neck pickup (both coils) and Middle pickup (both coils) and Bridge pickup (both coils) in parallel. Source: Read from the drawn wiring: the bridge volume feeds the toggle's left lower lug, the neck volume its right lower lug, and the toggle's middle lug joins the middle volume's output lug, which goes to the jack tip. The sheet prints no position legend. - Middle + bridge: Middle pickup (both coils) and Bridge pickup (both coils) in parallel. Source: Read from the drawn wiring: the bridge volume feeds the toggle's left lower lug, the neck volume its right lower lug, and the toggle's middle lug joins the middle volume's output lug, which goes to the jack tip. The sheet prints no position legend. - The middle pickup reaches the jack in every toggle position, as drawn, which the toggle's neck / both / bridge slot roles do not describe; see ruleExceptions. - Each pickup feeds its volume's wiper with the output taken from an end lug; the engine does not report the neck or middle volume as the volume control. Volume behaviour is not verified. - The engine's per-position pickup selection agrees with every expected state listed, but the board is published topology-only. - Hum cancelling and phase describe the generic pickup models; pickup resistance is not specified, so no numeric meter readings are given. ## Check before plugging in - In each toggle position, a meter across the jack should read the middle pickup in parallel with the neck, both others, or the bridge. - Each taped red–white joint should read open to ground. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 3H\_3G\_3V\_1T, revision 2. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().