Volvo VNL jake brake don't work

Discussion in 'Ask An Owner Operator' started by Schöne, Nov 10, 2021.

  1. Schöne

    Schöne Bobtail Member

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    Feb 23, 2019
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    Hi truckers. I had an ECU replaced and now the jakes won't work because it wasn't programmed right or something...no one can figure what's wrong. So for now I have to drive without jakes. Besides the old traditional way of downshifting, can I use the johnny bar (trailer brake) as well?
     
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  3. 77fib77

    77fib77 Road Train Member

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    St Louis
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    The trolley bar can overheat your brakes causing them to fail. Or better yet catch on fire. I drove with out Jake's in the mountains, I was in 6th gear. It sucked. Brake pedal switch went out or maybe it was the clutch switch.
     
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  4. Schöne

    Schöne Bobtail Member

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    Feb 23, 2019
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  5. Schöne

    Schöne Bobtail Member

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    Feb 23, 2019
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    Mine has to do with the ECU coz it was working before.
     
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  6. 86scotty

    86scotty Road Train Member

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    Howbout taking it back and having it fixed properly?
     
  7. Schöne

    Schöne Bobtail Member

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    Feb 23, 2019
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    Apparently it needs a new ECU and nobody has one in the whole USA and Canada. They've been trying to fix it for 3 months. So, it will be several months b4 it's available.
     
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