ABS ALWAYS TURN ON

Discussion in 'Freightliner Forum' started by Nazar, Mar 21, 2018.

  1. Nazar

    Nazar Bobtail Member

    3
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    Mar 21, 2018
    cleveland
    0
    Good day to all. I do not know if u have already discussed this topic, but I can not find it here. I always have an ABS turn on the trailer 7 way plug even though the key is turned off. Cascadia 2012.
     
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  3. Grumppy

    Grumppy Trucker Forum STAFF Staff Member

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    Dec 11, 2010
    West Monroe, La
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    So, you're saying that when you connect the electrical line from the truck to the trailer, the ABS light on the trailer comes on, even if the key on the truck is turned off???
    If so, you got a short on the trailer somewhere.
     
  4. Nazar

    Nazar Bobtail Member

    3
    0
    Mar 21, 2018
    cleveland
    0
    No ABS light at back of trailer maybe I not correct say I have always power at 7 way plug (blue wiring).Any time when I disconnect and connect plug to trailer I hear like work ABS in trailer but key stay at my hand truck not working.
     
  5. special-k

    special-k Road Train Member

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    Southern Ontario Canada
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    Is it causing a problem? You have constant power on the blue wire? correct?
     
  6. Nazar

    Nazar Bobtail Member

    3
    0
    Mar 21, 2018
    cleveland
    0
    Yes u are right Sir.
     
  7. Animosus

    Animosus Medium Load Member

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    2,474
    Dec 7, 2015
    SE Wyoming
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    [​IMG]

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    Get a regular 5 pin SAE relay and cut pin 87A off and you will get your intended functionality.
     
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  8. NorCenArk

    NorCenArk Light Load Member

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    35
    Mar 31, 2011
    Russellville, AR
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    Probably, the center pin was wired hot even when key is off for trailer tracking systems.
     
  9. Antinomian

    Antinomian Road Train Member

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    Feb 17, 2013
    0
    Or someone stuck the wrong relay in the socket.
     
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