Def heater lines

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by CrimsonPatriot, Feb 4, 2021.

  1. CrimsonPatriot

    CrimsonPatriot Bobtail Member

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    Anyone know which def heater lines are which on international? I got a def heater line 2 code and I did the plug and unplug method to see which one would stay and which two would clear. The inlet line is what it points to but I figured I would ask to make sure
     
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  3. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Model/year/engine........
     
  4. Goodysnap

    Goodysnap Road Train Member

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    Cummins set up is #1 = pressure , #2 =suction and #3 is return.

    So I would say you are correct. Should be from tank to pump inlet.
     
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  5. CrimsonPatriot

    CrimsonPatriot Bobtail Member

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    2015 prostar
     
  6. ChuckMartel

    ChuckMartel Light Load Member

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    Goody snap is right I believe.
     
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  7. QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Goodysnap is spot on
     
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