I just got a Schecter Model T 5 used that has passive pickups and electronics. It has a P and a J pickup. Both Duncan Design pickups. The bass sounds great. Very Fendery vintage sounding. The problem is, I get a buzz whenever the J pickup is turned on. The P pickup by itself is quiet but as soon as I turn the J pickup on the buzz begins. This is true even with both pickups on full or with the J on just by itself. The buzz is slightly quieter with both pups on but still there. The buzz goes away slightly when I touch the strings but is there while touching or not. If I move around the buzz gets louder and softer depending on which way I'm standing but is always there. My question is, is this a grounding problem or a sheilding problem or a combination of both? If there are any simple things I can look for, I would appreciate some suggestions.