PJ wiring issue

[basses]

I've just wired in some new pickups and having an issue with buzz.

The pickups are a fender 63 precision and a custom shop Jazz.

When i first wired them in they were out of phase when hooked up as per the schematic so i reversed the wires on one pick up. Ok so now they're in phase but the Jazz pickup that i reversed had a horrible buzz when you touch the pole pieces. I swap the wires back and flip the wires on the p bass pick up. Now the Jazz pickup is fine but the p pickup is buzzing. Basically which ever pick up i flip gets a buzz. If i leave em wired as per the schematic they're out of phase. it's bad enough to render the pickups un-useable so hoping some one can help

[thefyst]

sounds like when your flipping the pickup the polepieces arent grounded anymore.

[KiOgon]

Are we taking 2 or 4 wire pick ups? Both new & old?

Assuming the original pick ups were fine, in phase & no buzz - I would swap back one of the pick ups with the original & see which one of your new is out of phase.