Every vehicle has an electrical system that consists of three very important components: the battery, the starter, and the alternator. All these systems work together in a cyclical way, so an electrical problem that starts in any one of these components will affect the other parts of the system.
The electrical system comprises a storage battery, generator, starting (cranking) motor, lighting system, ignition system, and various accessories and controls. Originally, the electrical system of the automobile was limited to the ignition equipment.