# Two humbuckers with a three-way blade, two volumes and two tones Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-two-volumes-two-tones Two humbuckers · Three-way blade · Two volumes · Two tones Neck and bridge Seymour Duncan humbuckers, each with its own 500k volume and 500k tone with a .047 µF capacitor, selected by a three-way blade. Each volume's middle lug feeds a switch common. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-two-volumes-two-tones.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) - Bridge volume 500k: Volume 500k (left, bridge); 500k; compatible example (CTS 500k Audio Pot) - Bridge tone 500k: Tone 500k (left, bridge); 500k; compatible example (CTS 500k Audio Pot) - .047 cap (bridge): .047 cap (drawn green); 47nF; compatible example (Orange Drop .047µF) - Neck volume 500k: Volume 500k (right, neck); 500k; compatible example (CTS 500k Audio Pot) - Neck tone 500k: Tone 500k (right, neck); 500k; compatible example (CTS 500k Audio Pot) - .047 cap (neck): .047 cap (drawn green); 47nF; compatible example (Orange Drop .047µF) - Output Jack: Output Jack; compatible example (Switchcraft \#11) - Bridge Ground Wire: Bridge Ground Wire; generic (Bridge ground wire) ## Specific to this wiring - On each pickup, solder the red and white leads together and tape them off. - Each pickup has its own volume and tone; each volume's middle lug goes to a common lug on the switch, and three short jumpers join four other lugs into one output to the jack tip. - Each tone takes its signal from its volume's input lug, with the .047 cap on the tone's middle lug. - The source does not number the switch positions; the lugs are mapped by what they do (neck, both, bridge). ## Connections 1. Neck green → Neck volume casing (case, green): Neck green runs down to the neck volume's upper solder spot. 2. Neck bare → Neck volume casing (shield, bare): Neck bare (drawn grey) runs with the green to the same spot. 3. Bridge green → Bridge volume casing (case, green): Bridge green runs to the bridge volume's upper solder spot. 4. Bridge bare → Bridge volume casing (shield, bare): Bridge bare (drawn grey) runs with the green to the same spot. 5. Bridge volume right lug → Bridge volume casing (case): Bridge volume right lug bent to its lower solder spot. 6. Neck volume right lug → Neck volume casing (case): Neck volume right lug bent to its solder spot. 7. Bridge .047 cap → Bridge tone casing (case, black): The cap's other leg goes to the bridge tone's solder spot. 8. Bridge volume casing → Bridge tone casing (case, black): Wire from the bridge volume's lower solder spot down to the bridge tone's solder spot. 9. Neck .047 cap → Neck tone casing (case, black): The cap's other leg goes to the neck tone's solder spot. 10. Neck volume casing → Neck tone casing (case, black): Wire from the neck volume's solder spot down the right to the neck tone's solder spot. 11. Bridge tone casing → Neck tone casing (case, black): Wire from the bridge tone's solder spot across the bottom to the neck tone's solder spot. 12. Bridge tone casing → Jack sleeve (case, black): Wire from the bridge tone's solder spot down to the jack sleeve. 13. Bridge ground wire → Bridge tone casing (shield, black): 'Bridge Ground Wire' ends on the bridge tone's solder spot. 14. Bridge volume middle lug → Switch bottom-left lug (common) (wire, black): Bridge volume middle lug runs up to the switch's bottom-left lug (a common). 15. Neck volume middle lug → Switch top-right lug (common) (wire, black): Neck volume middle lug runs up to the switch's top-right lug (the other common). 16. Switch top-left lug → Switch second left lug (bridge, black): Short jumper between the switch's top two left lugs. 17. Switch second left lug → Switch third right lug (bridge, black): Jumper from the second left lug down to the third right lug. 18. Switch third right lug → Switch bottom-right lug (bridge, black): Jumper between the switch's bottom two right lugs. 19. Switch bottom-right lug → Jack tip (wire, black): Long wire from the bottom-right switch lug down to the jack tip. 20. Neck red → Neck white (insulated, red): Neck red and white end in the taped joint at the right. 21. Neck black → Neck volume left lug (wire, black): Neck black runs down the right and loops to the neck volume's left lug. 22. Bridge red → Bridge white (insulated, red): Bridge red and white end in the taped joint. 23. Bridge black → Bridge volume left lug (wire, black): Bridge black curves to the bridge volume's left lug. 24. Bridge volume left lug → Bridge tone left lug (wire, black): Bridge volume left lug straight down to the bridge tone's left lug (tone drawn lugs up). 25. Bridge tone middle lug → Bridge .047 cap (wire, black): Bridge tone middle lug takes one leg of its .047 cap. 26. Neck volume left lug → Neck tone left lug (wire, black): Neck volume left lug straight down to the neck tone's left lug (tone drawn lugs up). 27. Neck tone middle lug → Neck .047 cap (wire, black): Neck tone middle lug takes one leg of its .047 cap. ## What each position does - Neck: Neck pickup (both coils). - Neck + bridge: Neck pickup (both coils) and Bridge pickup (both coils) in parallel. - Bridge: Bridge pickup (both coils). - 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 switch position, the meter across the jack should read the selected pickup, or both in parallel in the middle. - Each taped red–white joint should read open to ground. ## Source Tinkercaster's own drawing of the Seymour Duncan diagram 2H\_3B\_2V\_2T, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().