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ABS cord

Discussion in 'Trucks [ Eighteen Wheelers ]' started by DDlighttruck, Aug 23, 2017.

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  1. Aug 23, 2017 #1
    DDlighttruck

    DDlighttruck Road Train Member

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    So why are there two plugs and two different cords? None of our trailers use the ABS style connector for the yellow cord.

    And my trailer ABS light is on often in the truck dash. Is that something I should get looked at?

    The truck came with a spare yellow cord that I'm thinking of tossing. We all run the green non-ABS cord
     
    DDlighttruck, Aug 23, 2017
    DDlighttruck, Aug 23, 2017
    #1
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  3. Aug 24, 2017 #2
    truckdriver31

    truckdriver31 Road Train Member

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    maybe a extra cord and plug for a lift gate trl.
     
    truckdriver31, Aug 24, 2017
    truckdriver31, Aug 24, 2017
    #2
  4. Aug 24, 2017 #3
    Riprap

    Riprap Light Load Member

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    The yellow cord is a 7 way ISO, on our trucks they power the dump valves for the axles, lift axles and for extra lighting on trailers
     
    Riprap, Aug 24, 2017
    Riprap, Aug 24, 2017
    #3
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  5. Aug 25, 2017 #4
    DDlighttruck

    DDlighttruck Road Train Member

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    IMG_0620.JPG IMG_0621.JPG
    That's what I'm talking about. Figured one of you guys could shed some light.
     
    DDlighttruck, Aug 25, 2017
    DDlighttruck, Aug 25, 2017
    #4
  7. Aug 25, 2017 #5
    Dye Guardian

    Dye Guardian Road Train Member

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    This here?

    20170825_093054.jpg

    We need it because we have so many trailer axles. I think there's another way to run multi-axle trailers without using it (but don't hold me to that), 99% of our fleet is setup using it.
     
    Dye Guardian, Aug 25, 2017
    Dye Guardian, Aug 25, 2017
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  8. Aug 25, 2017 #6
    Heavyd

    Heavyd Road Train Member

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    Depends. If you have an older trailer without PLC(Power line carrier) enabled ABS, then it cannot communicate with the truck's ABS system that is expecting it. PLC is just the fancy term used for how the trailer communicates it's ABS status with the truck to turn on or off that light. I think around 2001 was when it was mandated. If your trailer is newer than that, then it is basically an ABS fault light which fails a safety inspection. If the light never comes, that is a fail. If the light comes on and stays on, that is also a fail.
     
    Heavyd, Aug 25, 2017
    Heavyd, Aug 25, 2017
    #6
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  9. Aug 25, 2017 #7
    Riprap

    Riprap Light Load Member

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    I'm not that smart on wiring setups but all our trailers are wired with the center ABS pin on the green cord always hot (with key on)
    The yellow cord uses the pin in the 1'clock position for switched power for lift and dump axles, 12'oclock is ground. IMG_2175.PNG
     
    Riprap, Aug 25, 2017
    Riprap, Aug 25, 2017
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  10. Aug 25, 2017 #8
    DDlighttruck

    DDlighttruck Road Train Member

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    Ok that makes a lot of sense. Sounds like since we run no trailers with a lift I can leave the yellow cord at home. I will let the shop know about the ABS issue. Thanks!
     
    DDlighttruck, Aug 25, 2017
    DDlighttruck, Aug 25, 2017
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  11. Aug 25, 2017 #9
    AModelCat

    AModelCat Road Train Member

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    I think I've seen a couple trailers with lift axles that have the control mounted on the trailer itself.
     
    AModelCat, Aug 25, 2017
    AModelCat, Aug 25, 2017
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  12. Aug 25, 2017 #10
    Riprap

    Riprap Light Load Member

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    If nothing else and the trailer has the extra outlet up front I'd trace the wires back from the outlet to see what they go to
     
    Riprap, Aug 25, 2017
    Riprap, Aug 25, 2017
    #10
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