Seymour Duncan wiring

Esquire with one humbucker, three-way blade series/parallel/split

One humbucker · Three-way blade (series / parallel / split) · One volume · One tone

One Seymour Duncan bridge humbucker whose four leads go to a three-way blade: position 1 series, position 2 parallel, position 3 split to the slug coil. One 250k volume and one 250k tone with a .047 µF capacitor.

Esquire with one humbucker, three-way blade series/parallel/splitEsquire with one humbucker, three-way blade series/parallel/split: One humbucker · Three-way blade (series / parallel / split) · One volume · One tone. Original Tinkercaster drawing with labelled terminals.Bridge pickupBridge pickup3-way bladeVolume 250k · 250k250kTone 250k · 250k250k.047 cap · 47nF47nFOutput jackBridge groundblackgreenwhiteredbareT1T2T3T4T5T6T7T8lug1lug2lug3lug1lug2lug3abtipsleeveground

Viewed from the back of the controls, as you solder them. Open the interactive diagram to zoom, move components and try the switches.

Parts and values

In the drawingValuePart
Bridge pickupSource: Seymour Duncan Bridge Pickup—Humbucker (four-conductor, Seymour Duncan colours)Generic
3-way bladeSource: 3-Way Switch (unlabelled lugs)—CRL 3-Way BladeExample part
Volume 250k250kCTS 250k Audio PotExample part
Tone 250k250kCTS 250k Audio PotExample 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

  • Sheet title: Esquire | 1 humbucker, 3 way blade series/split/parallel.
  • Source legend, 3 Way Switch Settings: 1. Humbucker in series. 2. Humbucker in parallel. 3. Humbucker split to the slug coil.
  • The pickup's red lead goes to the switch's left-column bottom lug and its white lead loops over the switch to the right-column top lug. The black lead goes to the volume's left lug; green and bare go to the volume Solder spot.
  • Switch jumpers as drawn: left-column top lug to right-column second lug; left-column third lug to right-column bottom lug; right-column third lug to right-column bottom lug. The right-column third lug also runs to the volume Solder spot, and the left-column second lug runs to the volume's left lug.
  • The switch lugs are not labelled on the sheet. Each column is mapped as one pole: the lug each pickup lead lands on (left-column bottom, right-column top) is taken as that pole's common, and the other three lugs top to bottom as positions 1–3. With that map the drawn wiring gives the sheet's legend in every position.
  • The line from the volume Solder spot to the tone Solder spot is drawn dashed; it is transcribed as a ground wire because the jack sleeve's only drawn ground path runs through the tone casing.
  • The volume's right lug is drawn bent back onto its casing. The volume's left lug also runs straight down to the tone's left lug (tone drawn lugs up); the .047 cap sits between the tone's middle lug and its Solder spot.
  • Source legend: the grey 'Solder' spot = location for ground (earth) connections.
  • Tip (hot output). Sleeve (ground): the inner, circular portion of the jack.

Connections

In soldering order: grounds first, then the switch, the pickups and the signal path.

#FromToHow
1Pickup greenVolume casingTo a pot casinggreen
2Pickup bare shieldVolume casingDrawn grey beside the green.Shield or groundbare
3Switch right-column third lugVolume casingTo a pot casingblack
4Volume right lugVolume casingLug bent onto the casing.To a pot casing
5.047 capTone casingTo a pot casing
6Volume casingTone casingDrawn as a dashed line.To a pot casing
7Tone casingJack sleeveWireblack
8Bridge ground wireVolume casingShield or groundblack
9Pickup redSwitch left-column bottom lug (common)Wirered
10Pickup whiteSwitch right-column top lug (common)Loops over the top of the switch.Wirewhite
11Switch left-column top lugSwitch right-column second lugDiagonal jumper.Wireblack
12Switch left-column third lugSwitch right-column bottom lugDiagonal jumper.Wireblack
13Switch right-column third lugSwitch right-column bottom lugShort loop jumper.Wireblack
14Switch left-column second lugVolume left lugHops the green and bare leads.Wireblack
15Pickup blackVolume left lugWireblack
16Volume middle lugJack tipWireblack
17Volume left lugTone left lugWireblack
18Tone middle lug.047 capWire

What each position does

SettingThe sourceEngine result
Humbucker in series3 Way Switch Settings: 1. Humbucker in series.Bridge pickup (both coils).
Humbucker in parallel3 Way Switch Settings: 2. Humbucker in parallel.Bridge pickup (coils in parallel).
Humbucker split to the slug coil3 Way Switch Settings: 3. Humbucker split to the slug coil.Bridge pickup (split to one coil).

Not simulated: this circuit is drawn for reference only.

  • Engine rule selectionReachesTip fails because the one pickup reaches the jack in every blade position, outside the blade's neck/bridge slot roles; that is what the sheet draws.
  • The engine's per-position coil modes (series, parallel, split) agree with the sheet's legend, but the board is published topology-only.
  • Which coil is the slug coil is taken from the sheet's legend; the generic pickup model does not identify slug and screw coils.
  • Pickup resistance is not specified, so no numeric meter readings are given.

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 position 3, the pickup's red and white leads should both read as a short to ground.
  • In position 1, red and white should read joined to each other and 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.