2009 pete 387 speedometer

Discussion in 'Peterbilt' started by sprintcaracer, Jul 8, 2017.

  1. sprintcaracer

    sprintcaracer New Member

    speedometer doesn't move till 60 mph , then works fine.
    When speedo not on cruise and dpf light act funny.
  2. r3gulator3

    r3gulator3 Well-Known Member

    Likely VSS problem or tone wheel on the output shaft, wiring is a possibility and so is the gauge itself.
  3. Injun

    Injun Rabid Squaw Staff Member Supporter

    A little more detail might be helpful.

    As for the speedo, the 579 I had, it would jump to register 3 mph fast for no apparent reason and then hop back to register correctly, again, for no apparent reason. It was suggested to me to have the BCM ground checked, but I didn't get to it before I transferred the lease. I let the next driver know so he could get it looked at.

    Please describe "act funny" with DPF light.

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