This is usually an indicator of low brake fluid. Be sure to check brake fluid in the master cylinder reservoir. If it is low, then the brake system should be checked for leaks or worn brake pads or shoes.
If the brakes fluid in the reservoir gets too low, air will enter the system and cause a low brake pedal, and a poor or no stopping condition.
This light is different from the ABS brake warning. But a problem in the normal braking system can cause the antilock light to come on