Mustang PJ hums with volume off

Discussion in 'Pickups & Electronics [BG]' started by joeri, Sep 26, 2017.

  1. joeri


    Mar 10, 2009
    I bought myself a brand new mustang pj and noticed something very strange.
    With the volume on it hisses,ok maybe the shielding is not done very well but when I turn the volume all the way down I get a humming noise. The same noise as if you are leaving your cord unplugged on the ground.
    Checked the amp by trying another bass,switched cords,...
    But it's the mustang.
    A bass that hums with the volume all the way down!!!!??????
    Anybody who knows what could cause this issue?
  2. I tried one out today at a store and it didn't do that. The one I tried made zero noise.

    Must be a wiring glitch in that particular one.
  3. If you can hear anything at all when a volume pot is rolled all the way down, then it means that the volume pot is not providing a path to ground. The usual cause is a faulty ground. It's possible to have a bad pot, but the problem is almost always caused by a faulty ground on the pot.
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