I have had an Ultra Jazz set installed for about 6 months in my MIM Jazz. Lately I have been experiencing problems with my bridge pickup. The volume does not seem to work. The bridge p/u pot seemed to have very little/no effect both with or without the neck p/u involved. Also, this pot kills the signal altogether when it is cranked to the max. If you back it down a bit then the signal comes back. If you keep turning down the pot it makes almost no change in volume. Basically this thing was acting funny. I thought it was a bad bridge p/u pot from the MIM control plate. I decided to purchase a wired Control Plate with the S-1 Switching button from a 2003 (USA) Jazz. I wired the Ultra Jazz p/u and the S-1 switch (series/parallel) works fine. When the switch is depressed the bridge pot is not actice and the neck p/u pot controls all volume. I expected this. Oddly enough, when the S-1 (series/parallel) is not engaged the bridge p/u pot acts just like it did before installing the new control plate (with new pots). It still kills the signal when cranked and only alters volume a tiny bit (if at all). This makes me think the issue is not a bad pot. Could it be the Pickup itself? Any suggestions?