Please let us know which S&S location you plan to visit.

Please let us know which S&S location you plan to visit.

What Does An Alternator Do For My Car?

Many of the convenient and important features and functions of your vehicle require electrical power. Your car’s alternator serves as a kind of generator or charging system that provides that power. While the vehicle’s battery supplies some power, the majority of its devices draw electricity from a continuous supply from the alternator. 

BMW Dashboard and Steering Wheel

How The Alternator Works

Your car’s alternator is a mechanical device that is energized by the crankshaft of the engine. When the engine is running, the alternator transforms the motion of the crankshaft into electric energy. This is the electricity that powers devices such as the cooling fan, the stereo, the headlights, the windshield wipers, the air conditioning system, and the defogger.

What Are Signs That Your Alternator Is Having Issues?

If your alternator is creating a considerable amount of noise, this could be a sign that something is wrong with it. As the bearings inside the alternator become worn, you will often hear strange and excessive sounds when the hood is open. Other signs of trouble include:

  • Dead battery
  • Dim headlights
  • Starter problems
  • Burning smell
  • The “GEN” or battery service light may appear

What Service Does An Alternator Need?

During maintenance service your tire and auto service technician test how your battery, starter, and alternator perform at idle, during high RPMs, and under high voltage loads. Check your vehicle owner’s manual to find out how often your alternator should be inspected to avoid problems.