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Thread: Need Help Wiring Tach
          
   
   

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  1. #1
    HarryF's Avatar
    HarryF is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 23 T-Bucket
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    Need Help Wiring Tach

     



    I have an old Radson Tach with one each - red, yellow, and green wires. The wires are not marked and I need to know where to connect them.
    Thanks

  2. #2
    robot's Avatar
    robot is offline CHR Member Visit my Photo Gallery
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    Car Year, Make, Model: 39 Ford Coupe, 32 Ford Roadster
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    Not familiar with that brand but the common wiring for tachs was:

    yellow or white is the back light
    red is switched 12VDC
    green is the trigger (coil -)
    black is ground

    Take your ohm meter and see if there is continuity from the yellow
    wire to the case....it may be grounded thru the case....somewhere
    the thing has to be grounded!!!

    mike in tucson

  3. #3
    HarryF's Avatar
    HarryF is offline CHR Member Visit my Photo Gallery
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    Thanks for the quick responses guys.
    Harry F

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