Seymour Duncan wiring

Two humbuckers with a three-way blade and a push/pull phase volume

Two humbuckers · Three-way blade · One push/pull volume (phase)

Neck and bridge Seymour Duncan humbuckers on a three-way blade and one 500k volume. The volume's push/pull switch reverses the neck pickup's black and green leads, so with the blade in the middle, pulling the knob puts the two pickups out of phase.

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Viewed from the back of the controls, as you solder them. Select a component to move, rotate or flip it. Follow wires and try the switches in simulation mode. Use Full screen for a closer look.

Parts and values

In the drawingValuePart
Neck pickupSource: Seymour Duncan Neck Pickup—Humbucker (four-conductor, Seymour Duncan colours)Generic
Bridge pickupSource: Seymour Duncan Bridge Pickup—Humbucker (four-conductor, Seymour Duncan colours)Generic
3-Way Blade SwitchSource: 3 Way Blade—CRL 3-Way BladeExample part
Volume 500k (push/pull phase)Source: Volume 500k / Phase Switch500k500k Push-Pull DPDTExample part
Output Jack—Switchcraft #11Example part
Bridge Ground WireSource: Bridge ground wire—Bridge ground wireGeneric

“Example part” means any part with the same value and lugs will do; the source does not name a brand. “Generic” stands in for an unspecified pickup: check your own pickup's lead colours before you solder.

Specific to this wiring

  • On each pickup, solder the red and white leads together and tape them off.
  • The neck black and green leads go to the two middle lugs of the push/pull switch; its outer lugs are cross-jumpered in an X so pulling the knob swaps them.
  • The push/pull lug nearest the pot on the black side goes to the volume casing; the top lug on the same side goes to the blade's neck common.
  • The neck bare wire goes to the volume casing, not through the switch.
  • The grey 'Solder' spot marks the ground (earth) connections; the bridge ground wire goes to the volume casing.
  • The source does not number the switch positions; the lugs are mapped by what they do (neck, both, bridge).

Connections

In soldering order: grounds first, then the switch, the pickups and the signal path. Choose Show to highlight a connection in the drawing.

#FromToHowDrawing
1Neck greenPush/pull right middle lugWiregreen
2Neck bareVolume casingDrawn grey, looping round the right side to the solder spot.Shield or groundbare
3Bridge greenVolume casingTo a pot casinggreen
4Bridge bareVolume casingDrawn grey, running with the green.Shield or groundbare
5Push/pull left lug nearest the potVolume casingTo a pot casingblack
6Volume right lugVolume casingLug bent onto the casing.To a pot casing
7Volume casingJack sleeveTo a pot casingblack
8Bridge ground wireVolume casing'Bridge ground wire' ends on the volume's solder spot.Shield or groundblack
9Bridge blackBlade lower row, rightmost lug (common)Wireblack
10Push/pull left top lugBlade upper row, leftmost lug (common)Runs across the top of the blade.Wireblack
11Blade lower row, first lugBlade lower row, second lugJumperblack
12Blade lower row, second lugBlade upper row, third lugJumperblack
13Blade upper row, third lugBlade upper row, rightmost lugJumperblack
14Blade upper row, rightmost lugVolume left lug (input)Hops the bridge ground leads on its way down.Wireblack
15Neck redNeck whiteNeck red and white end in the taped joint at the upper right.Joined and insulatedred
16Neck blackPush/pull left middle lugHops the blade wire on its way to the switch.Wireblack
17Bridge redBridge whiteBridge red and white end in the taped joint below the blade.Joined and insulatedred
18Push/pull left top lugPush/pull right lug nearest the potOne leg of the X jumper.Jumperblack
19Push/pull right top lugPush/pull left lug nearest the potThe other leg of the X jumper.Jumperblack
20Volume middle lugJack tipHops the sleeve wire where the two cross.Wireblack

What each position does

SettingThe sourceEngine result
Neck, knob downNeck pickup, normal phase.Neck pickup (both coils).
Both, knob down: in phaseNeck and bridge together, in phase.Neck pickup (both coils) and Bridge pickup (both coils) in parallel.
Bridge, knob downBridge pickup.Bridge pickup (both coils).
Neck, knob pulled: neck reversedThe neck's leads are swapped; on its own it sounds the same as knob down.Neck pickup (both coils).
Both, knob pulled: out of phaseNeck reversed against the bridge: the phase switch.Neck pickup (both coils) and Bridge pickup (both coils) in parallel.
Bridge, knob pulledThe bridge does not pass through the push/pull.Bridge pickup (both coils).

Checked with the Tinkercaster wiring engine against the switching the source describes.

  • 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 reverses the phase; this follows the usual push/pull behaviour (pulled joins the middle lugs to the lugs nearest the pot).

Before you solder

Ticks are kept in this browser only, as a reminder. They are not a check of your joints. New to soldering? Read the soldering cheat sheet.

Check before plugging in

  • In each blade position, the meter across the jack should read the selected pickup, or both in parallel in the middle, with the knob up or down.
  • Knob pulled: the neck green lead should read continuity to the blade's neck lug and the neck black lead to ground.
  • Each taped red–white joint should read open to ground.

Measure across the output jack with a multimeter on its resistance range. No exact readings are given where the source does not specify the pickups.