The brake failure light is comming on in my 1990 348ts when I step on the pedal. I have already checked the fluid level and inspected the brakes, the pads and rotors are fine. The brakes feel normal so I do not were to start. The manual says the light comes on when fluid level is low or when the pressure to the booster is low. The light does not come on all the time and it does not stay on after I release the pedal. I can't find anything in the archives on this either. Any suggestions?