Mine does the same. I had brakes doneand afterwards the light was on. I took it over to my stealer and he said something might be wrong with the brakes, so I took it to Midas for a free estimate and they said everything was A OK, so I took it back to ford and said to try and disconnect the battery overnight and let it reset and if it still is on, then something is probally wrong with the ABS ring on the axle. I tried it, it stayed on all the time, but no braking problems so I let it go. I had it in the shop and the guy called me and said that the ABS ring is toasted on the axle and it can only be replaced with a new axle. I think this is bs , but I let it go anyways.