Another wiring mod I’ve stumbled across is called a “Tap Link” and works for guitars with dual humbuckers. Basically, you can link the mid-point of the two humbuckers together, so that when you activate just the neck (or bridge), there is 1 coil from the unselected pickup wired in parallel.
I find it easier to understand if we say that 2 humbuckers = 4 coils. Using the “tap link” activates 3 of the 4 coils.
I’ve taken the previously shared “4way 3 knob Tele” wiring for 2 humbuckers and changed 1 connection to achieve a slightly different set of options that includes a tap link setting. Can you find the change?
If you guess the L2 (Bridge) to Pin 5 connection of the switch, you are correct! The lower end of L2 now connects to the upper end of L1, which means, that the bridge is always active, always in series humbucking mode. In position 2, the switch actual shorts L2, instead of leaving it dangling.
I also dropped the bass control, just for simplicity. I left the “Sweet Switch” in, which is the additional treble roll off using C4 in the Bridge Setting only.
So the single change from the previous diagram affects the function of positions 3 and 4. 3 was previously 1 single coil from each humbucker (neck and bridge), in parallel, a traditional tele setting. It is now both humbuckers in parallel.
Position 4 was 1 single coil from the bridge in SERIES with 1 from the neck, the usual 4way Tele mod. A very nice, punchy humbucking tone. After the change, the 4th position is now the full bridge humbucker, with 1 coil from the neck in parallel with the upper bridge pickup. Kind of a series/parallel combo. It should be somewhat hum canceling, but not entirely. It would sound like the bridge humbucker, with a little bit of single coil neck mixed in.
It would be simple enough to use a push-pull volume pot to combine this new mod with the original 4way dual humbucker scheme to get the best of both. I wonder how this would sound using some kind of split-coil humbucker where each coil only covers 3 strings?