Is a ABS short common and how to fix it

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by blaze1608, Feb 1, 2013.

  1. blaze1608

    blaze1608 New Member

    I just recently had an issue with my ABS unit on my truck, the issue is that the electrical system was sending power to the ABS unit when it was not in use, even when the truck was turned off. I took it in to my mechanic and he suspected that the cable running from the electrical system was corroded and it just needed a cleaning. Upon further inspection he found that the ABS unit and wire were in prime condition and a electrical short was suspected. What I am wondering is. Is is a common problem? Is it easy to fix? and what is the general cost.
  2. j cat

    j cat Epic Member 5+ Years 1000 Posts

    the ABS module has a relay. this relay passes about 60amps of current to test the abs on every start operation as part of the on board diagnostics. what can occur and is common is this relay gets burned up and the abs pump will continue to run. I would remove the abs 60amp ABS fuse see what happens.
  3. the phantom

    the phantom Epic Member 5+ Years ROTM Winner 1000 Posts

    Removing the fuse may cause the ABS light to come on. Although your brakes should work fine. I have heard of rust forming under the mount of the sensor causing it to incorrectly read the revolutions of the wheel also causing the ABS light to come on or even kicking in the anti-lock brakes prematurely.
  4. RayVoy

    RayVoy Epic Member 5+ Years 5000 Posts

    Good suggestion [MENTION=39185]j cat[/MENTION], I suspect the relay contacts welded closed as well.
  5. j cat

    j cat Epic Member 5+ Years 1000 Posts

    I suggested the fuse removal as a troubleshooting aid not as a cure.

    on the ABS failure lights and activation when operating engine running this is the wheel hubs rusted out[bearing seal ] or the ABS module needs replacing.

    the relay and the hubs I would say cause most of the ABS failures with these vehicles.

    with the vehicle OFF and the ABS pump on ///,the relay is highly suspect and a well known failure component .
  6. blaze1608

    blaze1608 New Member

    Well I did that to remedy the problem, but its not a true fix. I was hoping for a full repair solution, but thank you for the help.
  7. j cat

    j cat Epic Member 5+ Years 1000 Posts

    well since thats done now get the abs module number and search online for a repair site. also you will find much help with the further troubleshooting and contacting these sites as to the repair costs and exactly what you must do to enable this much cheaper repair than OEM/dealership costs of over a thousand easy.

    as to the fix . Most when the vehicle gets this old do remove the fuse and forget about it. most do not have the time or cash to fix. I would fix it . its your call your vehicle.
  8. blaze1608

    blaze1608 New Member

    Well my mechanic said he could look into it, as it may be a short circuit in the system. However if he is not able to fix it, I will take your advice into consideration and seek other options. As for moving forward with the repair, I feel the same way and would like to repair it with haste and while cost is and always will be an issue, we (as in myself and my family) are capable to pay for repairs. Thank you all for your help and information.
  9. j cat

    j cat Epic Member 5+ Years 1000 Posts

    with what ever you do post back when the failure is corrected. good luck
  10. blaze1608

    blaze1608 New Member

    I will, as soon as it is fixed.

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