- Faulty alternator: The alternator is responsible for generating electricity and recharging the battery while the engine is running. If the alternator is not working properly, it may not be able to provide enough power to run the headlights and other electrical components, causing the engine to stall.
- Weak battery: If the battery is weak or has a low charge, it may not be able to provide enough power to start the engine and run the headlights at the same time. This can cause the engine to stall when the headlights are turned on.
- Electrical system problems: A short circuit or other electrical issue in the vehicle's wiring can also cause the engine to stall when the headlights are turned on. This is because the electrical system is overloaded and cannot handle the additional power draw of the headlights.
- Faulty voltage regulator: The voltage regulator controls the amount of electricity that is sent to the battery from the alternator. If the voltage regulator is not working properly, it may allow too much electricity to flow to the battery, which can cause the engine to stall.
