Posted on 9/1/2026
If you've ever wondered what an alternator does, the simple answer is: it generates electricity for your vehicle while the engine is running and helps keep the battery charged. The alternator is a key part of your vehicle's charging system. Without it, your battery would eventually run out of power, leaving you with a vehicle that may not start or continue running. How Does an Alternator Work? When your engine is running, the serpentine belt spins the alternator. The alternator converts that mechanical energy into electrical energy, which powers your vehicle's electrical systems and recharges the battery. The alternator helps provide electricity for: Headlights and interior lights Air conditioning and climate controls Radio and infotainment Power windows and locks Dashboard electronics Engine computers and other electrical systems Think of the battery as storing electricity and the alternator as generating electricity ... read more