Seymour Duncan wiring

Two humbuckers with a three-way blade, two volumes and a push/pull split tone

Two humbuckers · Three-way blade · Two volumes · One push/pull tone (splits both)

Neck and bridge Seymour Duncan humbuckers, each with its own 500k volume before a three-way blade, and a 500k master tone with a .047 µF capacitor. The tone'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.

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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 bladeSource: 3 Way Blade—CRL 3-Way BladeExample part
Bridge volume 500kSource: Bridge Volume 500k500kCTS 500k Audio PotExample part
Neck volume 500kSource: Neck Volume 500k500kCTS 500k Audio PotExample part
Master tone 500k push/pullSource: Master Tone 500k (push/pull Split Switch)500k500k Push-Pull DPDTExample part
.047 capSource: .047 cap (drawn green)47nFOrange Drop .047µFExample part
Output jackSource: Output Jack—Switchcraft #11Example part
Bridge groundSource: 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

  • The source says the tone's push/pull split switch splits both pickups.
  • Each pickup's red and white leads are soldered together onto one middle lug of the tone's switch, not taped off: bridge on the left column, neck on the right.
  • The two switch lugs in the row nearest the pot are jumpered together and wired to the tone casing; the row furthest from the pot stays empty.
  • Each volume's middle lug feeds a common lug on the blade; three short jumpers join four other lugs into one output that runs to the jack tip.
  • The master tone takes its signal from the jack tip, after the blade.
  • The bridge ground wire ends on the neck volume casing; the bridge volume casing, neck volume casing and tone casing are chained together, and the jack sleeve ends on the tone casing.
  • Solder = location for ground (earth) connections.
  • The source does not number the blade positions or its lugs; 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 greenNeck volume casingTo a pot casinggreen
2Neck bare shieldNeck volume casingDrawn grey beside the green.Shield or groundbare
3Bridge greenBridge volume casingTo a pot casinggreen
4Bridge bare shieldBridge volume casingDrawn grey beside the green.Shield or groundbare
5Bridge volume right lugBridge volume casingLug bent onto the casing.To a pot casing
6Neck volume right lugNeck volume casingLug bent onto the casing.To a pot casing
7Bridge volume casingNeck volume casingHops over the neck bundle.To a pot casingblack
8Bridge ground wireNeck volume casingWireblack
9Neck volume casingTone casingTo a pot casingblack
10Tone casingJack sleeveWireblack
11.047 capTone casingTo a pot casing
12Split switch left lug nearest the potTone casingTo a pot casingblack
13Bridge volume middle lugBlade left column, bottom lug (common)Hops over the neck red/white bundle.Wireblack
14Neck volume middle lugBlade right column, top lug (common)Loops down, then arcs over the top of the blade.Wireblack
15Blade left column, top lugBlade left column, second lugJumperblack
16Blade left column, second lugBlade right column, third lugJumperblack
17Blade right column, third lugBlade right column, bottom lugJumperblack
18Blade right column, bottom lugJack tipWireblack
19Neck blackNeck volume left lug (input)Wireblack
20Neck whiteSplit switch right middle lugWirewhite
21Neck redSplit switch right middle lugShares the lug with the neck white.Wirered
22Bridge blackBridge volume left lug (input)Wireblack
23Bridge whiteSplit switch left middle lugWirewhite
24Bridge redSplit switch left middle lugShares the lug with the bridge white.Wirered
25Tone left lugJack tipWireblack
26Tone middle lug.047 capWire
27Split switch left lug nearest the potSplit switch right lug nearest the potShort jumper along the row nearest the pot.Wireblack

What each position does

SettingThe sourceEngine result
Neck, knob down: full humbucker—Neck pickup (both coils).
Neck + bridge, 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 coilThe tone's push/pull splits both pickups.Neck pickup (split to one coil).
Neck + bridge, knob pulled: both splitThe tone's push/pull splits both pickups.Neck pickup (split to one coil) and Bridge pickup (split to one coil) in parallel.
Bridge, knob pulled: single coilThe tone's push/pull splits both pickups.Bridge pickup (split to one coil).

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 splits; 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

  • Tone knob down: in each blade position the meter across the jack reads the selected humbucker, or both in parallel in the middle.
  • Tone knob up: each reading drops to roughly one coil's resistance.
  • With a volume at zero, its pickup's black lead reads as a short 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.