What can be an indicator of a failing alternator?

A failing alternator can typically lead to insufficient electrical power being generated for the vehicle, which is crucial for operating various systems, including the headlights. When the alternator begins to fail, it may not deliver the necessary voltage for the electrical components to function correctly. This often manifests as dim or flickering headlights since they rely on the alternator to remain bright and stable while the engine is running.

In contrast, while steering column shake, frequent engine stalling, and overheating can indicate other issues within the vehicle, they are not directly linked to the function of the alternator. Steering column shake may suggest alignment or suspension problems, frequent engine stalling could be related to fuel delivery or ignition issues, and overheating usually points to cooling system failures or engine problems. Thus, dim headlights provide a clear and direct symptom indicative of alternator issues, making it an appropriate choice.