* Alternator Failure: This is the most common cause. The alternator recharges the battery while the engine is running. If it fails, the battery will quickly drain, leading to dimming lights and eventually a stall as the engine loses power.
* Loose or Corroded Battery Terminals: Poor connections prevent the battery from supplying adequate power. This can cause intermittent issues, including dimming lights and stalling, especially under load (e.g., when accelerating).
* Failing Battery: An old or weak battery might not be able to provide enough power to both the engine and accessories, especially if the alternator is also failing or underperforming.
* Wiring Problems: A short circuit, damaged wiring, or loose connections in the charging system can disrupt the flow of electricity, leading to similar symptoms.
* Faulty Voltage Regulator: This component regulates the output of the alternator. If it malfunctions, it might either overcharge (damaging the battery) or undercharge (leading to dimming lights and stalling).
In short, the dimming lights indicate a low voltage situation, and the stall is a direct consequence of the engine not receiving enough power to run. It's crucial to have a mechanic diagnose the exact cause as soon as possible, as driving with these symptoms can be dangerous.
