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Thread: How to bleed brakes with a ABS Modulator

  1. #1 How to bleed brakes with a ABS Modulator 
    San1tek
    Guest
    Replaced all brakes components. Bleed system 3 times using the starting at
    the Rt rear, Lt rear, Rt front, Lt front method. ABS light now on. Feels
    like air in system. Sponge peddal that can be pumped up. Classic air still
    in system. Without buying a scanner tool to activate the ABS module. Is
    there a way to use a jumper wire in the ALDL connector to activate the
    pump in the ABS modulator, while bleeding brakes to remove any air that
    may have gotten in the ABS modulator? Can't get brake fluid out to
    bleeders on modulator. I am calling the big silver box on the driverside
    wheel well with all the brake lines going to it the modulator. This is on
    a 1994 k1500 (4x4) chevy Suburban with 5.7.

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  2. #2 Re: How to bleed brakes with a ABS Modulator 
    Corey Shuman
    Guest
    Maybe different on the chev, but on my Rover, I turn the truck on, have
    someone pump the pedal 4-5 times, then bleed, repeat on each wheel,
    this has always worked for me. Good luck!!

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  3. #3 Re: How to bleed brakes with a ABS Modulator 
    Coasty
    Guest

    "San1tek" <[email protected]> wrote in message
    news:[email protected] lkaboutautos.com...
    > Replaced all brakes components. Bleed system 3 times using the starting at
    > the Rt rear, Lt rear, Rt front, Lt front method. ABS light now on. Feels
    > like air in system. Sponge peddal that can be pumped up. Classic air still
    > in system. Without buying a scanner tool to activate the ABS module. Is
    > there a way to use a jumper wire in the ALDL connector to activate the
    > pump in the ABS modulator, while bleeding brakes to remove any air that
    > may have gotten in the ABS modulator? Can't get brake fluid out to
    > bleeders on modulator. I am calling the big silver box on the driverside
    > wheel well with all the brake lines going to it the modulator. This is on
    > a 1994 k1500 (4x4) chevy Suburban with 5.7.
    >


    ABS systems are different pumping the break pedal is not always the best
    since doing so pulses the system it is not like pre or even older ABS
    systems. The best and easiest tool to use is a hand squeeze vacuum pump
    that can be used for break bleeding. Directions come with the tool which
    can be purchased at almost any auto parts store for $40.00. You only need
    one person and it works great I have been using one for several years on ABS
    autos and 4x4s.

    Coasty


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