@Steve Holt, taking your advice I'm trying to work my way through the first parts of the humbucker wiring. I think taking your approach of doing it in smaller sections could potentially work for me.
This was kind of my starting point.
Guitar wiring diagram with one humbucker, one volume control and two On/On mini switches. One switch selects series humbucker or parallel humbucker and one switch selects humbucker mode or single coil mode (South coil). <strong>Click diagram image to open/view full size version.</strong>...guitarelectronics.com
Then I took a look at this SD article in order to modify it so that the coil tap works for north/full/south so I have all three options available on that switch. (the DPDT on-off-on switch section specifically).
In this edition of guitar wiring explored, we take a look at some DPDT switch wirings that will give us access to additional humbucker tones.www.seymourduncan.com
This diagram is me still doing a bit of guess work, so I won't be surprised if you all tell me I'm way off base.
If you're interested in some good reading...
There was a wiring thread a few days ago that got me thinking about how difficult it is to get a balanced sound out of one single coil, and one humbucker. Problem: The full series-wired HB is overpowering, and splitting to one of the coils suffers a noticeable volume drop requiring a volume...www.tdpri.com
Here's a thread from @moosie discussing partial splits. I believe the final diagram to copy is in post 17.
Partially splitting a humbucker (by my understanding) keeps one coil active, and instead of sending the other coil completely to ground, keeps some of it in the signal. Your typical single coil might have 8000 winds of coil, but a humbucker might have 5000 winds on each coil. Splitting the bucker doesn't really get you a single coil to match your others.
I haven't tried this mod yet, but it's in my arsenal for my next build. To me this is much more exciting than using an on/on/on switch to switch from north coil to south coil active, but I'm not going to tell you that it's pointless, un-noticeable, or try to talk you out of it. Your ears are your ears and I really don't know what difference if any that would make. You have to pursue whatever gives you that spark.
Expanding on this, you can short either of the two series-linked coils. By shorting the link wire to ground, you have one coil wired hot to ground, and the other coil wires ground to ground.Here's how splitting a humbucker works - explained in a way that makes sense to my brain.
This is two pickups in parallel - you can imagine it as two singles or a humbucker, because we'll pretend it's a humbucker in a minute. To have a working pickup you need one end of the coil going to the hot signal, and the other end going to ground. Doesn't really matter which end either if it's only one pickup. It does matter when you get into multiple pickups (but that's a different topic)
Two Pickups in parallel.
View attachment 1051731
Here's a humbucker - You need one side going to ground, another going to hot.
In the middle you connect the two pickups with a series link.
View attachment 1051733
What happens when you split it is that you send the series link to ground. So what happens is the pickup on the signal side stays on because you're back to the first condition - one side going to signal, and the other going to ground.
the other coil shorts because both sides are going to ground.
Once I figured that out coil splitting made a whole lot more sense. Again, I'm not electrically minded so it took me a bit
View attachment 1051735
Hopefully that helps because it helped me more than just finding a diagram of a coil split and copying it every time.