ABS light stays on.
The ABS system monitors the wheel speed sensors. When one or more wheels seem to be off from where they should be the ABS system modulates the chosen wheels brakes in order to match the speed of the others. If any of the wheel speed sensors fail in any way, or the tone wheel on the axel or inside of the wheel bearing fail, the ABS light with illuminate. When illuminated the brake system will still work but the ABS system will be disabled which greatly increases the chance of locking up the wheels. A proper inspection of the brake system should be carried out by a technician to find out why exactly your ABS light stays on.
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