ABS brake lights on the dashboard stay on all the time?

Your ABS (Antilock Brake System) is not functioning. You still have basic brakes. Depending on what year and model vehicle you have you need to have a dianostic scanner plugged into the system to read the trouble codes. The codes will help direct you to fix the problem. The light will remain on until the system is repaired. Many auto parts stores will scan your vehicle for codes for zip if you buy the parts needed to repair from them.