Virtually all modern vehicles are manufactured with ABS brakes. ABS brakes function to prevent the brakes from locking up when they are pressed, predominantly in situations where the road conditions are slippery such as in snow or rain. Vehicles with ABS brakes have two warning lights — one for ABS system malfunctions and one for mechanical problems.
If one of the brake system warning lights come on, it can be a relatively minor problem or a major safety issue. Regardless of which brake light is illuminated, always check your car over before continuing to use your car.
Check the brake fluid level. Your brake fluid level is important for controlling your brakes. You will need to check your brake fluid reservoir to determine if you will need to add or flush the brake fluid.
If the fluid level is low, top off the fluid with clean brake fluid. You will need to flush your brake fluid and add clean brake fluid if your fluid level is low.
Check for a firm brake pedal. When you are parked in a safe place, press on the brake pedal as hard as you can. If the pedal slowly sinks to the floor, it indicates you either have air in the brake system or the fluid is leaking out.