So i swap out the Pups on my SX P bass to Duncan Performers and left the origanal SX factory pots etc in the bass they were 500k pots.I had no noise when i changed out only the pups. I decided to swap out the pots to 250k and changed out the jack to a switchcraft. I wired everything like the Duncan page and a thread here showed. I play at low volume at home so any noise was not heard. When i plugged in at higher volume at band practice i had terrible ground noise as soon as i touched the bridge or Cord end oh couse i was the ground and it stopped. I came home and tryed it at higher volume theu my GK..buzzz city.I pulled the bridge and looped the wire around a bridge screw and pugged in no dice lots of buzz. what do i check or do ...the wiring is tight and right i checked it several times...how do i check for ground with a multimeter? The bass was dead quiet when i first got it and my mad modding has created a buzzz monster help!!!!!!!!!!