Question about 2001 Ford Super Duty F 450

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ABS light and brake light stay on modt of the time. Brake pedal hard to push on occasion then releases and works fine.

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  • muhekwesley Jul 28, 2009

    I have a 2000 E450 super duty chassis under a class C Dutcman RV.

    The ABS and Brake light stay on most of the time. Recently when the lights were off and comming to a stop the brake pedal was hard to push at the beginning then released and braked properly and the lights came back on. The brake pads and calipers were recently replaced along with the front sensors. The problem existed before the brake repairs were made and no change. I was going to pull and clean the rear sensor. Just hoping it's not the module.

  • Warbox May 11, 2010

    What make and model of vehicle? Could be a bad wheel bearing.

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  • 52 Answers

I am guessing the truck is a 4 wheel drive... if that is the case, check your front wheel bearings. most vehicles that now use a hub and bearing assembly with built in ABS are common issues and easy repairs on MOST VEHICLES.

Posted on Aug 05, 2009

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1 Answer

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Few latest troubleshooting help links related to these problem.
ABS light stays on but brakes work fine? http://howtobyme.blogspot.com/2011/11/abs-light-stays-on-but-brakes-work-fine.html

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Sometimes ABS light comes on while Driving?


http://howtobyme.blogspot.com/2011/12/sometimes-abs-light-comes-on-while.html

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Brake Fade Issue? http://whoisbyme.blogspot.in/2012/07/brake-fade-issue.html Brake System Troubleshooting? http://technoanswers.blogspot.com/2011/11/brake-system-troubleshooting.html Car Brake lines have no pressure? http://schematicsdiagram.blogspot.com/2011/12/car-brake-lines-have-no-pressure.html Car Brakes Dragging? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-dragging.html Car Brakes grabbing? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-grabbing.html Car Brakes Making Noise? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-making-noise.html Car Brakes Pulling? http://repairhelpcenter.blogspot.com/2011/12/car-brakes-pulling.html Pulsating Brake Pedal? http://repairhelpcenter.blogspot.com/2011/12/pulsating-brake-pedal.html Spongy brake pedal? http://repairhelpcenter.blogspot.com/2011/12/spongy-brake-pedal.html Hard Brake Pedal? http://repairhelpcenter.blogspot.com/2011/12/hard-brake-pedal.html Fading Sinking Brake pedal? http://whoisbyme.blogspot.in/2012/06/fading-sinking-brake-pedal.html Brakes make Grinding noise? http://repairhelpcenter.blogspot.in/2012/06/toyota-corolla-brakes-make-grinding.html

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These will help.
thanks.

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1 Answer

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The air seeping is a dead giveaway. Your power brakes are now manual brakes, but stiffer. The diaphram in the brake booster has torn and the hissing noise is the engine vacuum escaping (you hear it louder when you depress the pedal right?). Replace the booster and you will be fine. The brake lights probably don't work because you can't push the pedal down far enought to release the switch. Please rate. Thanks.

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