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Help - 66 Shelby Cobra Tach Repair

Discussion in '1965-1970 Shelby Mustang GT350 & GT500' started by 65351W, May 15, 2009.

  1. May 15, 2009 #1
    65351W

    65351W New Member

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    I recently purchased a very nice vintage 1966 shelby tachometer. I need help with the internal wiring. The external wiring is as follows.

    1 red wire
    1green wire
    1 blue wire for the light

    Internal has 2 wires.

    1 green wire from the transformer stub to the front of the gauge behind the face plate.

    1 yellow wire from the transformer stub to ?????? The other end is not connected and I need to know where it goes.

    Any help is appreciated.

    Thanks.
     
    65351W, May 15, 2009
    65351W, May 15, 2009
    #1
  2. May 15, 2009 #2
    zrayr

    zrayr Well-Known Member

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    zrayr, May 15, 2009
    zrayr, May 15, 2009
    #2
  3. May 16, 2009 #3
    jbarela

    jbarela Well-Known Member

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    so is the main headlight engine harness specific to a gt350 running the tach for these wires to be connected to or were they spliced into the underdash wireharnes?? or what did shelby do to connect these tachs to the mustang wireing??
     
    jbarela, May 16, 2009
    jbarela, May 16, 2009
    #3
  4. May 17, 2009 #4
    zrayr

    zrayr Well-Known Member

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    wiring harness is stock Mustang. wire from ignition switch to resistor wire is unplugged and tach wires are plugged into the circuit. no splicing.


    Z. Ray
     
    zrayr, May 17, 2009
    zrayr, May 17, 2009
    #4
  5. May 17, 2009 #5
    Texas Swede

    Texas Swede Well-Known Member

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    Correct, the 66 tach is hooked up like a Rally Pac.
    Texas Swede
     
    Texas Swede, May 17, 2009
    Texas Swede, May 17, 2009
    #5
  6. Jul 11, 2009 #6
    Two Lane

    Two Lane New Member

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    www.TACHMAN.com


    The TACHMAN does concours level restorations

    as well as common upgrades & repairs, and

    is just as pleasant & friendly if all you need is

    help or advice. He charges about half-2/3rds

    of what you'd expect from any comparable shop.
     
    Two Lane, Jul 11, 2009
    Two Lane, Jul 11, 2009
    #6

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