Checking for a burnt out light bulb in the exterior lighting is a quick and simple task, but maintaining the exterior lighting is not that simple. Timely maintenance of exterior lights is very important for drivers, as it not only affects driving comfort, but also directly affects driving safety. Usually, it is difficult for car owners to realize that the headlights, tail lights, turn signals, or parking lights are no longer working properly before being reminded. By the way, replacing a burnt out light bulb is a simple task, and the cost of DIY is lower than the charging standard for repairing the lighting system at the repair station.
In most cases, the malfunction of lighting fixtures is not limited to minor issues such as bulb burning, socket corrosion, or plug damage, and professional diagnostic techniques are often needed to analyze the root cause of the malfunction. Even for low-priced cars, the interior and exterior lights are controlled by the main computer. Those luxury cars only have three computer-controlled headlights.
If the car is equipped with DRL daytime running light system, you must first understand the working principle of these devices. For example, some daytime running lights cannot be turned on before the engine is started, and some daytime running lights cannot function properly without the parking brake being released, even if the engine is started.
If the vehicle is equipped with light control lights, it is advisable to check the operation of the lights during the process of light sensitivity from weak to strong, and of course, do not ignore checking the automatic shutdown timer. If the system is equipped with a timer, set it to the maximum delay.