I know I know there have been plenty of threads, but all the links and images are too old and no longer exist. Also almost every thread was about both pickups as model J, P-J, ultra-jazzes or push-pull pots. This is just one neck pickup with a DPDT switch. I installed a single Dimarzio Model J in the neck position of my SX jazz, wired in series, worked great, then decided to add in the switch to get parallel as an option. After soldering, only one side of the switch works, the other just shuts the pickup off. I wired it just like http://www.dimarzio.com/media/diagrams/4Conductor.pdf except I have pole 1 going to ground on the pot and pole 4 going to hot to keep it in phase with the regular jazz pickup in the bridge (I had it like that originally, green to hot because it was out of phase when using red to hot). The white is just as shown and same with the black going across both those poles (3+5). Anyone know exactly what the DPDT switch does (how it connects which poles when its flipped one way or the other) so I could maybe find whats wrong? Newest info: When i tap the switch poles when it's plugged in, it buzzes. When the switch is one way (the way the pickup WORKS), it sounds trebley as if its in parallel, and the other way (when the pickup seems to be off/no sound) it's a louder and deeper sounding buzz, as if it is in series. Any idea why in series there is no sound but it works in parallel? I originally wired it in series and it worked perfectly. I know this switch works, I pulled it out of my T-40 (previous owner used the DPDT for pickup selector, I put in a DPTT so I could get both pickups as well as one or the other) and both positions worked fine.