At Fender's® request, the JD Tele® schematic is not available for publication. In the meantime, for your reference, here are the selector switch specifications:
Position ONE:
The neck (Strat®) pickup with the tone circuit OUT, affording a clearer, brighter tone to compensate for the inherent dullness normally found in this position. The result: a lead guitar sound that echoes the blues shadings of Clapton, Hendrix, etc.
Position TWO:
The neck (Strat®) pickup with the tone circuit IN, allowing the guitarist to soften the tone for rhythm or mellow leads, as per a stock Tele rhythm pickup.
Position THREE:
The neck and bridge pickups are in the standard stock parallel wiring with the tone circuit IN, enhancing the customary Tele® sound.
Position FOUR:
By combining both pickups with a capacitor and resistor in a controlled degree of reversed phase, the guitar offers a bell-like, rich tone that echoes the classic Strat® sound. Until now, this sound could only be obtained by the use of the bridge and middle pickups on a typical Strat.
Position FIVE:
An updated stock-style bridge pickup with symmetrically staggered pole pieces for great string balance and a special wind for increased sustain. It captures that great old Tele® lead sound that launched post-War popular music in America, and has the same gutsy, "punchy" tone of Jerry's prized '52 Tele®.
By the way, the Fender® Custom Shop Jerry Donahue Signature model uses a Seymour Duncan APTL-3JD Jerry Donahue Model bridge pickup and an APS-2 Vintage Flat pickup for Strat® in the neck position. In any event, the wiring is fairly complex and the key to the Strat® sound is using a Strat® pickup in the neck position. Sorry we can not provide any more detailed information.