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If you are referring to your Antilock Braking System (ABS), I would without a doubt recommend you take that vehicle to a Ford dealership and have them take a look at it. For something as important as your brakes, why take a chance?
In this website you can find information on almost all kinds of sensors and actuators http://sensorsinfo.blogspot.com/
I would recommend to go to the nearest garage and get checked your breaks. These guys offer inexpensive ABS sensors as well as other related autoparts.
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