Why would your 91 Buick roadmaster cut off while driving now wont start battry light is on?

If your 1991 Buick Roadmaster cut off while driving and now won't start with the battery light on, it could indicate a problem with the charging system, such as a failing alternator or a dead battery. The battery light suggests that the battery is not being charged properly; if the alternator isn't functioning, the battery will drain and eventually cause the engine to stall. Additionally, check for loose or corroded battery connections, which could also prevent the car from starting. It may be best to have the electrical system and battery tested by a professional to diagnose the issue.