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  1. #1
    Join Date
    Aug 2016
    Location
    Gainesville, GA
    Posts
    170

    Default Year One tach wiring harness question

    I have a stock in-dash tach for my 72 GS but no wiring harness. Does anyone have any input on the in-dash tach harness sold by Year One and Cars? Is it correct for a stock tach or is it made for the repop tachs? Thanks in advance.
    Brian

    1972 GS 350 Seamist Green
    2002 Trans Am WS6 6-speed

  2. #2
    Join Date
    Aug 2016
    Location
    Gainesville, GA
    Posts
    170

    Default Re: Year One tach wiring harness question

    Thought I'd give this a bump to see if anyone can answer my question. Thanks.
    Brian

    1972 GS 350 Seamist Green
    2002 Trans Am WS6 6-speed

  3. #3
    Join Date
    Feb 2002
    Location
    Oakland Gardens, N.Y.
    Posts
    27,442

    Default Re: Year One tach wiring harness question

    The stock tach is very simple. One signal wire to the negative side of the coil, and the tach body is grounded. That is it, besides the 2 bulbs for illumination. Aftermarket tachs frequently have a key on power lead, a separate ground wire, and the signal wire.
    Larry
    1998 "Fully Optioned" SC3800 Riviera
    70 GS 455 Stage1, TSP 470, 602 HP@ 5900, 589 TQ @ 4900
    TA Hyd Roller Cam, 230*/238*, 112, .544"/.577" lift, 4-7 swap
    MSD Digital 6+, Ignitionman Distributor w/MSD trigger
    THM400 with Ultimate 258mm converter, Gear Vendors OD
    AED 1000 HO Carb, 800 CFM 7042240 Quadrajet
    8.5 10 bolt, 3.73's Race weight 4025lbs.
    Best E.T. 11.54 Best MPH, 116.06
    Larrymta@verizon.net, GSCA #291
    BPG # 1063
    N.E. GS/GN Club Assistant Director

  4. #4
    Join Date
    Aug 2016
    Location
    Gainesville, GA
    Posts
    170

    Default Re: Year One tach wiring harness question

    Thanks Larry.
    Brian

    1972 GS 350 Seamist Green
    2002 Trans Am WS6 6-speed

 

 

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