Bad Alternator Symptoms (7 Warning Signs)

Battery light came on at a stoplight. The headlights are dim, the radio reset itself twice on the drive home, and now the car cranks slow or won’t start at all. That’s textbook bad-alternator behavior. The part you’re looking at is the engine-driven generator (also called the charging system) that keeps the battery topped up and powers every electrical load while the car runs. When it starts to fail, the symptoms cascade fast, and the order they show up in tells you how close...