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Unknown wire from tone pot

Discussion in 'Stratocaster Discussion Forum' started by JAxel, Nov 13, 2017 at 3:04 AM.

  1. JAxel

    JAxel New Member!

    Age:
    46
    3
    Monday
    Denmark
    Hi,
    I'm installing a new pickguard and shielding the cavities on my 1987 american standard strat. I have run into a problem. I don't know where this wire with "screw in" ring attached to the front tone pot goes. I haven't been able to locate any wiring diagram the shows this specific wire.

    Help is very much appreciated!

    [​IMG]
     

  2. fender kev

    fender kev Strat-Talker

    376
    Jan 1, 2010
    uk

  3. Yves

    Yves Senior Stratmaster

    Jan 2, 2016
    London
    This wiring is confusing me a little. I take it that the wrapped-up B&W wires pointing downwards on your pic are the Jack's contacts.
    The long black wire going nowhere pointing upwards is to be soldered onto the claws in the trem pocket?
    My guess is that both cercled screw ring ends go to the one same screw.
    The one on the RHS on this pic must be closer to the screw than the other.
    Here's a PIC of my wiring but that is a 60s vintage type.
    DSC03052.JPG
     

  4. Yves

    Yves Senior Stratmaster

    Jan 2, 2016
    London
    You can see in my case the only ground wire is the one soldered to the claws.
     

  5. Thrup'ny Bit

    Thrup'ny Bit Certified Curmudgeon Strat-Talk Supporter

    Age:
    58
    May 21, 2010
    In my own little world
    That's because your guitar doesn't have conductive shielding paint in the cavity like modern ones do. So screwing an ground wire to the wooden body wouldn't do any good.
     
    Yves and s5tuart like this.

  6. JAxel

    JAxel New Member!

    Age:
    46
    3
    Monday
    Denmark
    Yes the top black wire is going to be soldered to the tremelo and the black & white are for the jack.

    The cavity for the pickups have shielding paint and a hole for the circled screw-in on the right.

    The cavity for the pots do not have shielding paint or a hole for this mystery wire from the tonepot. The wire is to short to reach the hole for the srew-in in the pickup cavity.
     

  7. Thrup'ny Bit

    Thrup'ny Bit Certified Curmudgeon Strat-Talk Supporter

    Age:
    58
    May 21, 2010
    In my own little world
    So if the mystery wire is connected to the back of the tone pot you have a choice. Either put in another screw and ground it or insulate it and forget it.
     

  8. Deschain

    Deschain Strat-Talk Member

    Age:
    52
    91
    Jun 23, 2017
    Denmark

  9. JAxel

    JAxel New Member!

    Age:
    46
    3
    Monday
    Denmark
    Alle tiders. Tænkte det nok. :)
     
    Yves likes this.

  10. Yves

    Yves Senior Stratmaster

    Jan 2, 2016
    London
    I'd sez so myself.
     

  11. Thrup'ny Bit

    Thrup'ny Bit Certified Curmudgeon Strat-Talk Supporter

    Age:
    58
    May 21, 2010
    In my own little world
    It must have been put there for one, or Fender wouldn't have bothered.
     

  12. Deschain

    Deschain Strat-Talk Member

    Age:
    52
    91
    Jun 23, 2017
    Denmark
    Probably "belts and braches"... It may not have been put there by Fender.

    In a shielded strat, you have a ground connection to the bridge, a ground connection to the shielding in the cavity and a ground connection to the output jack. That connects everything to a common ground.
     
    Last edited: Nov 13, 2017 at 2:26 PM

  13. Thrup'ny Bit

    Thrup'ny Bit Certified Curmudgeon Strat-Talk Supporter

    Age:
    58
    May 21, 2010
    In my own little world
    I know, I've been at this a little while myself. I think I'll go back to filing my frets...
     

  14. bonedust

    bonedust Strat-Talk Member

    Age:
    49
    36
    Jan 25, 2016
    Brisbane Australia
    I've seen ground wires like that connected to the 5 way switch (usually to the volume pot on old Japanese strats).
    Do you get a signal without it? See if it reaches the screw on the switch, if it does do you get a signal.
    Connect the jack and rub a screwdriver across the pickups to check for a signal and test that the tone pots are working.
    Do you know if the pickups are original? Did it have a dummy coil at some stage?
    I'm not sure why the cavity is only half shielded?? Was someone half way through the job?
    Sorry more questions than answers.
     

  15. Mr Dunlop

    Mr Dunlop Senior Stratmaster

    Nov 30, 2014
    usa

  16. muf magician

    muf magician Strat-Talk Member

    71
    Jan 10, 2015
    Texas
    This is what I've seen and based on the length of the wire and it's proximity to the switch I'd say this is the most likely answer.
     
    bonedust and Mr Dunlop like this.

  17. usul1978

    usul1978 Guitar bricolo Strat-Talk Supporter

    Age:
    39
    660
    Dec 9, 2015
    France
    It looks like overkill grounding...