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    Diesel Laptops Bypass Breakout Main Programming Cable

    Diesel Laptops Bypass Breakout Main Programming Cable


    This is our "main" cable that you can use to build your own unique bypass/breakout cable used to connect directly to a commercial truck ECM. If you purchase any of our bypass cables individually, you will need this cable as well.

    Our bypass cables are a 2-piece system, with each one needing this one. Why would anyone need an ECM breakout harness? Here are a couple reasons:

    • Most OEMs recomend NOT programming the vehicle through the dash connector, but instead go direct to the ECM. These are the perfect programming cables for such a project.
    • You are having issues with the diagnostic port on your commercial truck, and wish to bypass the vehicle wiring and go direct to the ECM.
    • You have an ECM that is not installed on the truck, and wish to do programming or modifications to it on the workbench.


    • Harness length is 24".
    • All cables are tested on live ECMs and validated before shipping.
    • Professional, quality manufacturing of cables made in the USA.
    • 12-month warranty on all components.

    More Information

    If you would like to learn more about ECM programming, we have a great blog post that goes into depth on the subject, along with explaining what software you would need.


    Learn more about our engine bypass and programming cables in this short video

    Customer Reviews

    Based on 3 reviews
    Jimmy Boriack

    Worked out great

    sergio castillo

    Diesel Laptops Bypass Breakout Main Programming Cable

    Robert Adkins

    Fast shipping, quality cables