Disclaimer: I know very little about guitar electronics. My 2002 American Deluxe Jazz V has developed a slight buzz. It's not so much a problem live but is very noticeable when plugging straight into a DI when recording. This issue was discovered at my friend's studio even when trying different DIs and preamps. I know that it probably needs shielding which it doesn't have. I got the test meter out and started checking ground connections and it seems that ground is connected between strings/bridge/control plate. The strange thing is that the exposed pole pieces of the pickups are also connected to ground. Is this right? None of my other basses are like that. Thanks.