Like other mechanical systems of the car, the crankshaft pulley uses an accessory belt for powering up other components. It is used for reducing the vibrations that exist in the accessory belt and distribute the engine power to other systems. If the crankshaft pulley is damaged in your car, then it not only affect the operation of the engine but also other mechanical and electrical parts of the car. The following given video helps you to determine the damaged crankshaft pulley in the car.
https://www.youtube.com/watch?v=MWiQd4wUJGg