Schaller Double J Pickup Wiring Question

Discussion in 'Pickups & Electronics [BG]' started by seannance511, Jun 12, 2020.

  1. seannance511


    Dec 9, 2010
    I am building a P/JJ bass and just received this NOS Schaller JJ pickup.
    I have absolutely no idea what to do with 8 leads.
    The wiring will be a simple passive Vol/Vol/Tone with a P pickup in the neck position and the JJ in the bridge.
    Which wires on the JJ are hot wires that need to run to the Volume pot, and which are the grounds?
    I do not intend to use a push/pull or on/off or any kind of fancy switching.
    Just need to know what is hot and what is ground.

    Screen Shot 2020-06-12 at 3.03.08 PM.png
    cstclair likes this.
  2. PawleeP


    Oct 8, 2012
    East Coast
    good luck, someone should chime in if you look at the Duke Model Bass Thread.
  3. jahmadeus


    Mar 13, 2020
    Hopefully this is some use to OP or someone who just so happens to be confused (as I was) on how to wire this pup.

    By no means is this a end all be all analysis of this pup but you might find this useful for at least getting a couple usable wiring out of the pups (there are many more options). My interpretation on why this works could be wrong so take it with a grain of salt.

    I was given an old 1981 Kramer Pioneer PJ bass (I think it is an 'Imperial' model) which had been wired up incorrectly. Rewiring the standard p bass style (neck) pickup was easy as the Schaller color codes available online at seemed to be accurate for this pickup.

    However, when trying to wire up this double j pickup, using that color scheme yielded less than desirable results (sounded like bad phasing/very hallow). This occurred even when not blending with the neck pickup.

    I was able to find an old for-sale ad of the same bass that included a picture of the electronics. I wired up my bass to mimic the picture and this seemed to fix the phase issues and give great sounding results.

    Here is the wiring I used vs the stewmac diagram (I'm assuming this is the original way it was wired in Kramer basses). This is for an on/on/on switch.


    Schaller Humbucking Pickups |

    So this leads me to believe that the color code listed by stewmac, which is accurate for the neck pbx style pickups, is reversed for the jbx pickups. It seems that...
    Green on the stewmac diagram = White,
    Yellow = Brown,
    White = Green,
    Brown = Yellow

    So that means if you want these in series:
    Brown is Hot +
    Yellow and Green are tied together
    White is Ground

    In parallel:
    Brown and Green are Hot+
    Yellow and White are Ground

    The stock Kramer wiring has each color pair tied together so that each coil pair is in parallel. Sounds pretty good to me although I'm sure there are a handful of other cool ways to wire this pickup.

    Best of luck.
    Last edited: Sep 15, 2020
    rojo412 likes this.
  4. myrios


    Apr 30, 2003
    Hey! I am also building a P/JJ with that same double j and found this thread.

    In tinkering with my ohmmeter I’ve found a wiring configuration that I hope will work. Basically I want the jj to have more output than the p so I simply connected all the jj wires amongst themselves in a circular pattern “in series “ as if they were just 4 p pickups. The remaining two end wires when connected to the ohmmeter reads about 18ohms.

    The wiring harness I plan to use is from an 80’s Fender Power Jazz Special. Very unusual passive/active electronics with a sweep filter for either mid or low active boost, plus Fender’s “TBX” tone control that adds a mysterious “hi-fi” effect to the upper end …I’m anticipating to pull more out of the jj than I heard from my old Duke.

    I’m planning to use either some Bartolinis or an old 80’s p set that are about 13ohms.

    just experimenting! Not sure if the winding directions in the jj are going to be a factor…

    Curious about how your p/jj turned out?
  5. e/mguitars


    May 15, 2005
    Everett, Wa.
    Hey all, I'm preparing to wire one of these pickups into a bass I'm building, and I'm using stacked pots, so that each of the four coils will have it's own volume control. If I'm reading this right I'm going to want to wire the white and the brown to it's designated hot, and the green and yellow to ground. Is that right? In theory I can get either or both jazz pickups independently, as well as P and reverse P just from using the volume knobs. Am I on the right track?


    Apr 3, 2021
    Was wondering what other brand of pickups I can throw into this bass that would fit