Brake Light On problems of the 1999 Ford Taurus

Total brake failure: having worked on cars for 40+ years and owned many vehicles over the years, it was a surprise to suffer total brake failure without ever having the brake light indicate a failure. For as long as I can remember, all my vehicles had a primary and secondary brake circuit with a pressure differential switch that would latch and light the brake warning light. On several occasions a partial brake failure was caught by the warning light. Master cylinder replacement was performed quickly as driving with one circuit is dangerous. The 1999 Ford Taurus has no brake pressure differential switch, no kidding! if one does not make panic stops as a regular part of driving, it is easier than one would think to have a partial failure go undetected (despite that there must have been extra pedal travel). When the second circuit fails the result is total brake failure without warning. In my opinion, this is criminal negligence, the same type of thinking as the Ford pinto fuel tank. Forget the cup holder, spend the money on the safety switch!!! I shudder to think of people seriously injured due to this missing switch.

My Ford Taurus ant-lock brake system light under the dash board while driving alternately flashes on and off sometimes while I am braking. While braking sometimes the anti-lock brakes doesn't work.

After purchasing heard grinding and shaking in steering column when brakes are applied. Took to dealer, and they replaced front rotors and pads in may and in September. Consumer had same problem, brakes were failing, and it was hard to stop vehicle. In October, brakes and rotors were replaced again. On October 3rd brake light was coming on so dealer replaced master brake cylinder.

While driving the brake light came on, but the brakes were still workng. Shortly after the consumer tried to apply the brakes ,and the pedal went all the way to the floor. Please provide any futher information.