What supplies electrical power to the vehicle when it is running?

The alternator is responsible for supplying electrical power to the vehicle while it is running. It is a crucial component of the automobile's charging system, converting mechanical energy from the engine into electrical energy. This electrical energy powers the vehicle's electrical systems and recharges the battery while the engine is operating.

When the engine is started, the starter motor draws power from the battery to crank the engine. However, once the engine is running, the alternator takes over the role of supplying electricity, ensuring that all electrical components receive adequate power — including lights, radio, and various sensors.

The ABS module and the computer do rely on power supplied by the alternator but do not generate power themselves; instead, they function as part of the vehicle's electrical system. The starter, on the other hand, is only active during the starting process and not while the vehicle is in motion. This differentiation highlights the critical nature of the alternator's role in maintaining the vehicle's electrical system during operation.