I am trying to diagnose some shoddy wiring of some active pickups. All the wiring is done and appears to work. However I get:

  • some buzz from neck pickup when a note is played. Bridge pickup is fine
  • weird hum when touching wire to selector switch from bridge volume pot (see video)

  • 3
    Hum when touching components is a grounding issue, which means something is not connected correctly. Check all the soldering, and switches and pots. We have a number of posts on here about grounding so please have a read – Doktor Mayhem Jan 20 at 10:09
  • The hum when poking things is because your body acts a big antenna, picking up mains frequency hum from all the wiring around you. Don't poke things, and it won't hum. – Simon B Jan 20 at 20:53
  • Right I understand that concept - but an insulated wire is conducting that electricity? That's what i don't get – Barry Chapman Jan 21 at 22:19

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