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external tachometer

This is a discussion on external tachometer within the General Help forums, part of the LSx Technical Help Section category; adding external tach w/ shift light???????? can i leave factory tach hooked up, where do i pick my signal up? ...

  1. #1
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    1998 Z-28

    external tachometer

    adding external tach w/ shift light???????? can i leave factory tach hooked up, where do i pick my signal up? only has red,blk,yel,grn ,wires out of tachometer

  2. #2
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    2000 Grand Prix GTP
    2000 Trans Am WS6 M6

    Quote Originally Posted by B2BTOWPRO View Post
    adding external tach w/ shift light???????? can i leave factory tach hooked up, where do i pick my signal up? only has red,blk,yel,grn ,wires out of tachometer
    Auto Meter?

    Red = Ignition
    Black = Ground
    Green = Cylinder 1 Coil Pack Power (Purple)
    Yellow = not sure

  3. #3
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    Yea you can leave the factory tach functional, not sure what yellow is either, maybe for the light? Anyway the tach output siginal wire on a '98 is pin #35 white wire on the blue connector: www.ls2.com/boggs/torques/98pinpcm.htm

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