Discussion in 'Pickups & Electronics [BG]' started by lefty, Jan 12, 2005.

  1. lefty


    Sep 25, 2004
    i get a humming on my mim jazz bass. i bought the body off of ebay it`s like brand new and it buzzez or humms. there is only one wire comming off of the jack and it`s positive. i tried wiring a ground to the jack and no go, still hums. is it the stock pickups doing this? should i change pickups? i want to stay with passives. thanx.
  2. If you open up the control cavity by lifting the silver control plate (remove three screws) is there not a ground running into a tunnel to the bridge? If so, is it loose by any chance?

  3. Sundogue


    Apr 26, 2001
    Wausau, WI
    You are possibly experiencing the infamous 60 cycle hum, which Jazzes are known for. That's not a grounding problem, but rather inherent in the design of the pick-ups.

    The P-Bass has a split coil pick-up wired in series to eliminate the hum, thus it's known as a humbucker.

    You may still have a grounding problem though. Is it a buzz, or a low hum?
  4. HeavyDuty

    HeavyDuty Supporting Curmudgeon Staff Member Gold Supporting Member

    Jun 26, 2000
    Suburban Chicago, IL
    Moved to Pickups...