Cruise control

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Lowboy265, Sep 24, 2020.

  1. Lowboy265

    Lowboy265 Bobtail Member

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    Sep 23, 2020
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    Cruise control on 2007 T-800. Will work when parked. Will not work going down road. What could be the problem?
     
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  3. Goodysnap

    Goodysnap Road Train Member

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    Engine? My first step would be to check vehicle speed and park brake signals in ECM. ECM doesnt need vehicle speed to idle bump when parked.

    Also make sure the clutch a brake pedals are released fully.
     
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  4. truckdriver31

    truckdriver31 Road Train Member

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    take you left foot and pull up on the clutch pedal and try setting cruise then. i once had a freightliner that the clutch pedal was out of adjustment and wouldnt let cruise work
     
  5. Lowboy265

    Lowboy265 Bobtail Member

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    Sep 23, 2020
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    Found the problem. Wires on park brake sensor. Were crossed. Working 100%. Thanks!
     
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