I just got a 94 LS and the pump on it turns on and after a few min the ABS light turns on. Is there any way to fix the unit or do I have to replace my ABS pump and all?
the motor is turned on by the abs control unit when the pressure in the abs system (accumulator) is low and stops the pump when the pressure reaches a predetermined value. in your case the pump runs for a period of time and never reaches that pressure value, stops the pump and kicks on the abs light.
start your diagnoise by pulling the abs code to see where the problem lies