Why do the car lights not turn on when locking but turn on when unlocking?

[DelLukas]

Because the car door is not properly closed when locking. Here are the specific details: Lights not turning off: After locking the car, the lights may not turn off. In fact, many car models nowadays will provide a reminder if the lights are left on after locking. Simply ensure the lights are set to AUTO mode, and after locking, there's no need to manually turn them off—they will automatically turn off after a short period. We recommend setting the lights to this mode so you don't have to worry about forgetting to turn them off. Headlights: The combination headlights are located at the front of the car and primarily serve lighting and signaling purposes. The light emitted by the headlights illuminates the road ahead, allowing the driver to drive safely at night. Fog lights: Fog lights are not mandatory by national regulations, but most car models are equipped with them. Taillights: The combination taillights are located at the rear of the car and mainly serve lighting and signaling purposes.

[OEloise]

This issue is actually quite common and mainly caused by your vehicle's lighting control system. Most modern cars come equipped with welcome lights or safety lights that illuminate upon unlocking - a design feature to light up the surroundings, helping you locate your car or door handles in the dark. The lights automatically turn off when locking to conserve power and protect battery life. I once encountered a similar situation with a friend's car, and after inspection, we found it was due to poor contact in the door lock sensor causing signal errors - cleaning the door edge switches resolved it. Additionally, low battery in the remote key fob might send incorrect commands, so try replacing the battery to see if it improves. Ultimately, safe driving is the priority. This design prevents prolonged light usage that wastes energy, but if the lighting issue affects normal operation, it's best to visit a professional shop for circuit diagnostics using specialized equipment.

[Olivia]

The fact that the lock light doesn't illuminate while the unlock light does is actually a smart design feature, just like my own car. When unlocking, the light turns on to illuminate the door area, making it convenient for loading items or locating the keyhole; when locking, it automatically turns off to prevent accidentally draining the battery by leaving the light on. In daily use, this helps extend battery life and reduces maintenance frequency. Possible causes could be a sluggish signal from the door lock mechanism or a mismatched module program, occasionally requiring a software update. I recall helping a neighbor with a similar issue last month—lightly tapping near the door lock to reset the sensor restored normal light function. Regular vehicle maintenance can prevent these minor issues, ensuring convenient and worry-free trips.

[SanElliot]

This phenomenon is quite normal. The lights turning on when unlocking helps prevent tripping and ensures nighttime driving safety, while turning off when locking avoids unnecessary energy consumption and potential risks. After years of driving, I've noticed that some car models have automatic light control chips that may send such signals if they age, but more commonly, it's due to dust blocking the sensor. Promptly cleaning the dirt from the door switch gaps usually solves the issue, ensuring responsive performance is key.