1999 Peterbilt 379 Detroit 60 12.7 sensor location

Discussion in 'Peterbilt Forum' started by rslivelyjr, Dec 8, 2023.

  1. rslivelyjr

    rslivelyjr Bobtail Member

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    I need to know where the parking brake sensor is located , not the brake switch the parking switch , when you push in your air to move that sensor . Thanks guys
     
    blairandgretchen Thanks this.
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    Saw your last thread. I have 1995 Pete 12.7

    No cruise , No Jake - right? And wonky readings on speedometer?
     
  4. blairandgretchen

    blairandgretchen Road Train Member

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    South west Missouri
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    Check the tail shaft sensor - I believe that’s your speed sensor - remove, clean, reinstall - all the way in then back off 1.5 turns - jamb nut. Or replace.

    Cruise and Jake - will be clutch or brake switch. Try wiggling clutch linkages and brake pedal when parked.

    My problem was that some idjit had tapped into the ‘ground’ (which it is) circuit for another reason - they’re all white numbered wires.

    TPS shouldn’t affect it.
     
  5. rslivelyjr

    rslivelyjr Bobtail Member

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    No I have a 1999
     
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