I've encounted an unusual wiring schematic

[ibanezplayer]

I've done a few pickup swaps that have been relatively straightforward. 

This latest one I am seeking to replace the dimarzio pickups with some different dimarzio pickups. This is an ibanez iron label guitar with two humbuckers, one volume knob and coil tap switch. It's clear to me where the red and white wires will be soldered to but what is unique about this particular setup is the green wire from one pickup travels to the coil tap switch and the other green wire grounds to the volume pot. I have attached a link to a video, I am hoping this is a relatively intelligent question and I don't get trolled too hard. There is about a four inch section of shrink tubing where the ground wire comes out and grounds out at the pot. I'm wondering why this is there and they didn't just strip less of the insulation off and bring the entire wire right to the pot.

[newey]

Ibanezplayer-

Hello and welcome to G-Nutz2!

I am hoping this is a relatively intelligent question and I don't get trolled too hard.

Even relatively unintelligent questions don't get trolled around here. A legit queston deserves a legit answer, and the only non-legit questions are the ones that you already know the answers to if you pondered it a bit longer.

The video is less than helpful, as the wires are moving around too much to be able to ascertain much. A diagram of your existing wirint would help.

There is about a four inch section of shrink tubing where the ground wire comes out and grounds out at the pot. I'm wondering why this is there and they didn't just strip less of the insulation off and bring the entire wire right to the pot

It's probably there to "tidy up" the wiring, so bare wire doesn't come into contact with something it shouldn't. Maybe the supplier who sells the part to Ibby already stripped it back for some other purpose.

but what is unique about this particular setup is the green wire from one pickup travels to the coil tap switch and the other green wire grounds to the volume pot.

Again, just speculating here without a diagram of the wiring, but it sounds like you have one switch that is cutting both HBs to single-coil operation simultaneously. If so, wiring the two HBs such that opposite coils were selected when both are in SC mode would enable the combo to be hum-cancelling, and so it seems that is what is going on here. IOW, one North coil and one South coil when single coil is selected.

[ashcatlt]

Yeah just tear it apart and wire it correctly. Don’t even worry about what they did. I mean I’m kinda curious and if you wanted to document it for posterity, I think we’d all be interested to see it. But we know how to make it do what you want, and you have all the parts you need, so...

...what are you actually trying to accomplish?