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.
ABS light comes on at 15 mph. on 1992 GMC Suburban 1500
have someone scan it for codes to see if a sensor may be going bad or you have a solenoid or pressure problem at the abs controller, or calipers. Sounds like one sensor is reading different speed then the other.