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ABS/Brake light on?

Discussion in 'Exterior' started by acolic, Dec 27, 2019.

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  1. acolic

    acolic Senior Member

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    Hi

    Started my truck and the ABS/Brake light is staying on.

    Did a bit of research online and checked the break fluid and fuses and they are all good?

    Any other common areas to check?

    Thanks for the help.

    Alex


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    Krookdjonnyrook likes this.
  2. PuffTheMagicDragon

    PuffTheMagicDragon Member

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    Do you have a code reader capable of pulling the ABS code...? Would make this much easier.

    It could be the sensor in the brake fluid reservoir that is faulty. That is a fairly common issue. It could be a wheel speed sensor that went out. It could be the ABS module that lost communication from a squirrel eating the wires. It could be a lot of things. Without a code, we’ll just be taking shots in the dark.

    Hopefully it is something simple.
     
  3. acolic

    acolic Senior Member

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    I don’t have an ABS specific tester but my regular reader says there is a 01257 wrong oil DTC.

    What’s the wrong engine oil have to do with an ABS error?


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  4. Karlsweg

    Karlsweg Senior Member

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    Does your cruise control still work? If not I would agree on speed sensor in front hub or the sensor located on the top of the rear end.
     
  5. acolic

    acolic Senior Member

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    Hi

    The cruise does not work.

    How many speed sensors are there? One in each front hub?


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  6. Karlsweg

    Karlsweg Senior Member

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    Some have one on each hub. Mine only had one on the driver side hub.
     
  7. acolic

    acolic Senior Member

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    Just got a call from the mechanic they have been driving around town with a computer hooked up to the truck and all sensors are working fine and no error codes present.

    Love these types of issues.



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  8. Karlsweg

    Karlsweg Senior Member

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    Mine popped up when I was towing and cleared itself when I wasn’t towing. Towed again and light came back on and lost cruise control. Changed front speed sensor and no problems.
     
  9. CVX20

    CVX20 Senior Member

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    Been wrenching for a living since long before ABS came out and I've never seen a system with just one sensor on the front.
     
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  10. Karlsweg

    Karlsweg Senior Member

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    8B311969-F80B-4F83-95FD-4ADE1E2BF6C4.png
    Look n rock auto they sell hubs with 4 wheel abs sensor or for left front with sensors on 2 of the wheels. only rear wheel abs has 1 sensor on left front. I’m not a mechanic just a stupid retired cop.
     
    Last edited: Jan 4, 2020

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