What are common signs of a failing alternator?

Dimming headlights, flickering dashboard lights, or difficulty starting the engine are all symptoms commonly associated with a failing alternator. The alternator is responsible for recharging the battery and powering the electrical systems while the engine is running. When the alternator begins to fail, it may not provide sufficient voltage, leading to less electrical output.

As a result, the electrical components in the vehicle suffer from inadequate power, which manifests in dim or flickering lights. For instance, as the engine runs, if the alternator isn’t generating enough power, the headlights may appear dimmer than usual or may flicker due to inconsistent voltage levels. Difficulty starting the engine is also a sign of alternator failure since the battery may not be getting charged sufficiently, failing to provide the necessary power needed to start the vehicle.

The other choices relate to issues that either pertain to different systems or do not directly correlate with alternator health. Excessively high engine temperature can indicate cooling system issues, and increased fuel consumption usually points to fuel system or engine performance problems. Unusual sounds from the engine could stem from a variety of mechanical issues unrelated to the alternator's operation.