ABS light comes on at 15 mph.

What is your question?

The ABS light comes on at 15 mph and stays on until my 1992 Suburban comes to a stop or mph drop below 15 mph.The light does not come on all the time but when it does sometimes after a while of driving it will turn off on it's own.I have replaced the seals on my rotors and cleaned the sensors as my truck is equiped with only two ABS sensors in the front.But the problem happens on and off.