Radiator service, something to read about
If your brake light goes on when your parking brake is off, you need to check your brake fluid levels. A brake fluid leak manifests itself by sight (a light amber color) and a smell that is distinctive. Rotor surface issues cause vibrations of the brake pedal or wheel. If in need of repair, your brakes may also squeal until you come to a full stop or when you release the brake pedal. That means that your brake wear indicators may be scraping against the rotors.