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help on hookinh up tach on HEI

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by bwoodard, Dec 26, 2001.

  1. bwoodard

    bwoodard Registered Member

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    Can someone tell me where the green wire from the tach goes on a HEI distributer, Or just tell me where to hook up all the wires.

    Thanks Brian
     
  2. BurbinOR

    BurbinOR 3/4 ton status

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    I assume your 'green wire' that you refer to is the 'tach' signal wire for the coil...........right? If so, there is a plug/connection on the HEI that says 'TACH' on the little ear that sticks out for this hookup.

    <font color=blue>'79 ONE TON TPI K5 - See it at---&gt;<a target="_blank" href=http://www.blazzinor.rockcrawler.com>www.blazzinor.rockcrawler.com</a>
     
  3. 95 Silverado

    95 Silverado 1/2 ton status

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    yes, on the side of the distributor cap, where the wires plug in from the distributor base and wiring harness, there is an empty terminal marked tach on the cap. hook the tach signal wire to that terminal

    '95 Chevy Silverado 1500
    5.7 V8-NV4500- 3.73 rears
    See My Toys: <a target="_blank" href=http://community.webshots.com/user/wdb172454>http://community.webshots.com/user/wdb172454</a>
     
  4. Michael

    Michael 1/2 ton status

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    A .250 Female spade will plug onto this "Tach" connection. Just crimp one onto the end of your wire and press it on. A small mirror might be helpful on the first try.

    Michael[​IMG]
    <a target="_blank" href=http://www.jmartin.net/parker/goose.htm>www.jmartin.net/parker/goose.htm</a>
     
  5. Can Can

    Can Can Pusher Man Staff Member Super Moderator

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    Soory to change the topic a little bit, but what all is involved in the install? I imagine the tach would have a power wire and a sender wire......Where do you hook the power up to?

    Where have you guys installed your tachs other than the dash?



    <font color=blue> NEVER FORGET, NEVER FORGIVE, NEVER SURRENDER<font color=blue>
     
  6. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    Red is 12 V keyed hot
    White is power from the instrument lights so the tach will dim with the panel
    Black is ground
    Green is Tach signal from the distributor

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
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