What are common indicators of a faulty alternator?

The correct answer highlights several common signs that indicate a faulty alternator. Dimming lights often occur because the alternator is unable to properly generate enough electrical power to maintain optimal brightness as the vehicle's electrical system demands energy. Malfunctioning electrical accessories, such as power windows, radio, or dashboard lights, can also be a direct result of insufficient voltage produced by the alternator.

Additionally, a dead battery frequently happens when the alternator fails to recharge the battery while the engine is running. If the alternator is not producing the necessary power, the battery will eventually deplete as it cannot sustain its charge, leading to starting issues or complete failure. These symptoms are directly tied to the alternator's role in charging the battery and powering the vehicle's electrical systems while the engine is operating, making them key indicators of a malfunctioning alternator.

The other options do not relate directly to the alternator's function. Increased fuel usage typically relates to issues with fuel delivery or engine performance rather than electrical system failures. Frequent overheating suggests problems with the engine cooling system or radiator, not the alternator. Unusual tire noises are usually indicative of suspension issues or tire problems, rather than being linked to the vehicle's electrical system.