What is the reason for the small light not turning off?
2 Answers
The reason the small light does not turn off is that the turn signal was not reset when the engine was turned off. The functions of the small light include: 1. Making the vehicle more easily identifiable during daytime driving; 2. Alerting surrounding vehicles and pedestrians when the vehicle is turning by activating the small light; 3. Providing road illumination during nighttime driving. Vehicle lighting consists of position lights, turn signals, headlights, fog lights, reverse lights, and brake lights. The methods for using lights during rainy weather are: 1. When it starts raining lightly, turn on the daytime running lights; 2. When the rain intensifies, turn on the headlights and front fog lights; 3. In case of heavy rain, turn on the low-beam lights along with the front and rear fog lights.
The small light not turning off could be caused by several reasons, with the most common being a faulty door switch. If your car's small light remains on after the engine is turned off, it might be due to a stuck or poorly contacting door or trunk switch. I once encountered this issue and found that the door switch was clogged with dust, preventing the contacts from disconnecting and keeping the light powered. Another possible cause is a short circuit in the wiring, such as aging or moisture causing a local ground, allowing current to flow directly to the light without control. A relay issue could also be the culprit, where the relay controlling the lights gets stuck and fails to turn off. The most troublesome scenario is a fault in the body control module, where the system erroneously sends commands to keep the light on. I recommend starting with simple checks: close all doors and press the switch to see if the light responds; if not, check the fuse or consult a professional technician for diagnosis. If not repaired promptly, the battery may drain, potentially leaving you unable to start the car the next day, which can be a significant inconvenience.
