2009 Peterbilt 389 dash blinking and engine brake and cruise control cut out.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by heesens, Sep 12, 2023.

  1. heesens

    heesens Bobtail Member

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    2009 Peterbilt 389

    tac and speedo guages bounce back and forth. odometer has lines representing the numbers. jake brake and cruise control kick off . check engine light flickers and says seek service immediatley. engine fan kicks on and off when all this is taking place. The truck itself drives as it should with no issues while all this is happening. any ideas, please let me know. thanks
     

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    heesens, Sep 12, 2023
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  2. SomeCanadian

    SomeCanadian Light Load Member

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    Check the cab ground? And possibly some of the other ones?
     
    SomeCanadian, Sep 16, 2023
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