Why do the headlights automatically turn on when unlocking the car with the key?

1 Answers
MacBradley
07/30/25 8:45am
When the headlights automatically turn on upon unlocking the car with the key, it is likely because the light control has been set to the automatic mode. This situation usually occurs when the headlights are controlled by a light-sensitive trigger switch. Below is some related information about remote keys: 1. Introduction: A remote key utilizes the wireless remote control function of the central locking system, allowing you to unlock or lock the doors from a distance without inserting the key into the lock. 2. Working Principle: Simply put, the key emits a weak radio wave, which is received by the car's antenna. The electronic control unit (ECU) then identifies the signal code, and the system's actuator (motor or electromagnetic coil) performs the unlocking or locking action.
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