An alternator is a maintenance-free yet the most important unit of the car’s engine. It generates electricity, provides electrical supply to vehicles, and recharges the battery. The alternator works by converting mechanical energy into electrical energy from alternating current to the direct current.
The primary function is to work jointly with the battery to supply energy to the electrical components, i.e., lights, fan, windshield wipers, etc. It changes the alternating current into a direct current and regulates the voltage to meet the required minimum power for each unit.
Since an alternator is connected to many components, it exhibits a complex wiring system. The main wirings include the exciter wire, positive and negative cables. Exciter wire is connected to the L terminal of an alternator and is used to turn on the voltage regulator. Excitor wire is needed to generate the voltage required for the alternator to run.