Ground Wire question

Discussion in 'Tone Zone' started by Gene Machine, Jan 22, 2021.

  1. Gene Machine

    Gene Machine New Member

    Joined:
    Jan 20, 2021
    Messages:
    12
    Likes Received:
    8
    Hey all. I have a new-to-me 2018 standard, and i noticed it is noisy with overdrive, more than it should be. I touch the pickup covers, noise goes away. BUT, not when I touch the bridge...

    weird

    So I checked the cavity (PCB of course) and checked electrical continuity between all the grounds. Turns out, the solid copper wire is not connected to either of the bridge pieces. I don't know what it's connected to inside the guitar. It is secure into the PCB, and from the ground wire to the pot body, output jack, etc. the continuity rings good. But, there is no continuity to the bridge.

    Anyone see this before?

    They wired the damned things normally for at least 40 years, why do they have to screw with stuff that isn't broken. (I know, $$) but even cheap guitars are hand wired. I'm pretty sure a re-wiring job is in my future somewhere to replace that stupid PCB.

    But what about that damned ground wire? Where does it go?
     
  2. cerebral gasket

    cerebral gasket Well-Known Member

    Joined:
    Jan 13, 2017
    Messages:
    3,555
    Likes Received:
    4,448
    Ground wire should be connected to bottom of stop bar tailpiece bushing.
     
    Gene Machine and Go Nigel Go like this.
  3. plankton

    plankton Well-Known Member

    Joined:
    Dec 4, 2016
    Messages:
    1,105
    Likes Received:
    1,038
    Location:
    Adelaide, Australia
    I had that issue on an inexpensive SG copy. The ground wire was there and ran to the bottom of one of the tailpiece studs but wasn't actually touching them or the post. I stuffed some steel wool down there and Bob's your uncle!

    Do you see any wire coming off the PCB back into the guitar body?
     
  4. Gene Machine

    Gene Machine New Member

    Joined:
    Jan 20, 2021
    Messages:
    12
    Likes Received:
    8
    Yeah, solid copper wire. I gave a gentle tug and it’s connected to something.

    Did you have to take the bushing out of the body, or just unscrew the pin?
     
  5. plankton

    plankton Well-Known Member

    Joined:
    Dec 4, 2016
    Messages:
    1,105
    Likes Received:
    1,038
    Location:
    Adelaide, Australia
    I unscrewed the post and tried to tap the bushing in further as it was sitting up a bit and not touching the ground wire. That was unsuccessful so I went with the steel wool.
     
  6. donepearce

    donepearce Well-Known Member

    Joined:
    Dec 12, 2012
    Messages:
    4,639
    Likes Received:
    4,003
    Location:
    London, new hearing aid project - exciting
    That will work but maybe not permanently. The ground wire is usually trapped between the bush and the wood of the body; this keeps it held tight. It sounds like on yours the wire was instead pushed down and lost contact. The permanent fix would be to pull the bush and put the wire back where it is supposed to be - alongside the bush.
     
  7. Gene Machine

    Gene Machine New Member

    Joined:
    Jan 20, 2021
    Messages:
    12
    Likes Received:
    8
    Thanks all, I made sure everything was tight on the PCB, put everything back together and abracadabra it all works good now. A bit suspicious, but I’ll keep an eye on it. Not a fan of PCB, but it will do for now.

    Probably could use with a rewire eventually, I don’t like the taper on the pots. Anyway, that’s a separate thread.

    This one fixed for now. Need to go play this for a bit.
     
    plankton and cerebral gasket like this.

Share This Page