Are J pickups supposed to be reversed wound so that when both pickups are active they cancel out the hum? I thought this was the case but my MIM jazz hums like hell at moderate to high volumes. At first I thougt it was the flourescent lights but when I got it home and cranked it I found the same hum. If I replace the pickups with Duncans that are reversed wound will that take care of it or is there something else going on? Does anyone know if the Fender J replacements are reversed wound for hum cancelling? I did replace the pickgaurd but the original doesn't seem to have any shielding that the replacement doesn't. I also replaced the bridge with a Badass II, I don't think it is the ground but I will check that as well. Any help or advice would help, it's frustrating to have such a noisy bass.