# Two humbuckers with a three-way blade, one volume and two tones Canonical page: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-one-volume-two-tones Two humbuckers · Three-way blade · One volume · Two tones Neck and bridge Seymour Duncan humbuckers selected by a three-way blade into one 500k volume. Each pickup has its own 500k tone with a .047 µF capacitor, wired on the pickup's lead before the switch. Drawing: https://guitarwiring.app/wiring-diagrams/seymour-duncan/two-humbuckers-three-way-blade-one-volume-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) - Neck tone 500k: Neck Tone 500k; 500k; compatible example (CTS 500k Audio Pot) - .047 cap (neck): .047 cap (neck tone); 47nF; compatible example (Orange Drop .047µF) - Bridge tone 500k: Bridge Tone 500k; 500k; compatible example (CTS 500k Audio Pot) - .047 cap (bridge): .047 cap (bridge tone); 47nF; compatible example (Orange Drop .047µF) - Volume 500k: Volume 500k; 500k; compatible example (CTS 500k Audio Pot) - 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's black lead goes to a lug on its own tone pot, and that lug runs on to a common lug on the switch, so each tone only works on its own pickup. - Each .047 cap sits between its tone's middle lug and that tone's casing. - Three short jumpers join four switch lugs into one output, which goes to the volume's input lug; the volume's middle lug goes to the jack tip. - The grey 'Solder' spots mark the ground (earth) connections. - The source does not number the switch positions; the lugs are mapped by what they do (neck, both, bridge). ## Connections 1. Neck green → Neck tone casing (case, green): Neck green runs to the neck tone's solder spot. 2. Neck bare → Neck tone casing (shield, bare): Neck bare (drawn grey) runs with the green to the same spot. 3. Bridge green → Bridge tone casing (case, green): Bridge green runs to the bridge tone's solder spot. 4. Bridge bare → Bridge tone casing (shield, bare): Bridge bare (drawn grey) runs with the green to the same spot. 5. Neck .047 cap → Neck tone casing (case, black): The cap's other leg goes to the neck tone's solder spot. 6. Bridge .047 cap → Bridge tone casing (case, black): The cap's other leg goes to the bridge tone's solder spot. 7. Volume right lug → Volume casing (case): Lug bent onto the casing. 8. Neck tone casing → Volume casing (case, black): The wire hops one crossing wire on its way to the volume's solder spot. 9. Neck tone casing → Bridge tone casing (case, black): Straight down between the two tone solder spots. 10. Bridge tone casing → Jack sleeve (case, black) 11. Bridge ground wire → Volume casing (shield, black): 'Bridge ground wire' ends on the volume's solder spot. 12. Neck tone top lug → Switch top-right lug (common) (wire, black): The wire loops up over the switch to its top-right lug. 13. Bridge tone top lug → Switch bottom-left lug (common) (wire, black): The wire runs right and up to the switch's bottom-left lug. 14. Switch top-left lug → Switch second left lug (bridge, black): Short jumper between the switch's top two left lugs. 15. Switch second left lug → Switch third right lug (bridge, black): Jumper from the second left lug down to the third right lug. 16. Switch third right lug → Switch bottom-right lug (bridge, black): Jumper between the switch's bottom two right lugs. 17. Switch bottom-right lug → Volume left lug (input) (wire, black): The wire runs down and round to the volume's left lug. 18. Neck red → Neck white (insulated, red): Neck red and white end in the taped joint above the neck tone. 19. Neck black → Neck tone top lug (wire, black): Neck black runs right and down to the neck tone's top lug. 20. Bridge red → Bridge white (insulated, red): Bridge red and white end in the taped joint above the bridge pickup. 21. Bridge black → Bridge tone top lug (wire, black): Bridge black hops over the ground wire and ends on the bridge tone's top lug. 22. Neck tone middle lug → Neck .047 cap (wire, black): The cap is drawn on the back of the neck tone. 23. Bridge tone middle lug → Bridge .047 cap (wire, black): The cap is drawn on the back of the bridge tone. 24. Volume middle lug → Jack tip (wire, black) ## What each position does - Neck: Neck pickup (both coils). Source: Only the neck tone acts. - Neck + bridge: Neck pickup (both coils) and Bridge pickup (both coils) in parallel. Source: Both tones act, each on its own pickup's lead. - Bridge: Bridge pickup (both coils). Source: Only the bridge tone acts. - 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 simulator reports one tone control per position; the second tone is wired the same way on the other pickup. ## 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. - 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\_3B\_1V\_2T, revision 1. Not the manufacturer's artwork and not endorsed by Seymour Duncan. See also [all wiring diagrams]().