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Does anybody know which coil is used when a SD trembucker is split?
Is it the north, or south wound one.
I ask because I made a git with a SD trembucker, bridge,
and a p-90 at the fb.
The SD polarity closer to the bridge reads north, the other coil on that pickup reads south.
The p-90 at the fb reads south.
I ask, because I had problems wiring this thing.
I pulled out my Schatten polarity tester and took some readings........

I went here
http://www.seymourduncan.com/products/electric/humbucker/cutting-edge/patb1_parallel/

If this is the trembucker you're talking about, when I hit the link provided for wiring diagrams(in red, scroll down) it takes me to a page that has general wiring instructions for their humbucker pickups. i would assume that they are wired for coil splitting the same as all the other SD humbuckers.
That's as much as I could find. Hopefully, that helps you. If not, you could spend some time on their website and maybe find the answer. Or shoot them an email. I'd bet they'd get back to you pretty quick. Good luck.

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Mike

The only thing nescessary for evil to thrive is for good men to do nothing.

Depends on if you use the green or black lead for the hot.
Black=north start
white=north finish
red=south finish
green =south start
For normal humbucking operation the white and red wires are soldered together.
If you wire the pickup with the black being the hot and the green being the ground, when the coil link is grounded via the coil cut switch, then the north coil will be the active one.
If the GREEN is hot and the black is ground, then when the coil link is grounded by the coil cut switch , the south coil will be active.
Unless you have both pickups wired in the same lead wire configuration, you will have a phase issue, so as far as coil cutting goes, you really can't select which one is the one you want to cut.
However, you CAN wire a 3 switch so that you can select either coil or both.
If you want to use a push-pull pot to cut both coils at once, you're stuck with whatever coil phasing allows you to do. That's not usually a problem unless you mix Duncan's and Dimarzio's ( or whatever).

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Old growth, shmold growth!

Thanks for the replies.
I will look into it.
I think the problem is the north on the humbucker is out of phase with the p-90,
which is supposed to be a Seymour, but I got it off e-bay.......
So........... Could be anything.
I got this polarity tester years ago, and saw it sitting there in my shop,
and it got me thinking.
Pretty handy cheap tool.

I got a Duncan once that had the lead wires attached all wrong, the color coding was off. It was out of phase with it's sister, and it was a matched set! I was able to figure out which wire was which, and made it work.
Sometimes it happens.

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Old growth, shmold growth!

If you have a phase issue it may be easiest to flip the magnets in the p 90 to a north up position to work with your current wiring scheme.

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How long is that in luthyears?