Checking for burnt out LED headlights and lighting bulbs is an extremely quick and simple task, but comprehensive and systematic maintenance of exterior lighting fixtures is not that simple. Timely maintenance of exterior lighting fixtures is crucial for drivers, as it not only affects driving comfort but also directly relates to driving safety. It is usually difficult for car owners to realize that the headlights, taillights, turn signals, or parking lights are no longer functioning properly before receiving a reminder. By the way, replacing a burnt out light bulb is very simple, and its DIY cost is lower than the charging standard for lighting system maintenance at repair stations.

In many cases, the malfunction of car lights is not limited to small problems such as burnt out bulbs, corroded sockets, or damaged plugs. Professional diagnostic techniques are often required to analyze the root cause of the malfunction. Even for low-priced cars, their internal and external lighting fixtures are controlled by the main computer. And those luxury cars, only their headlights are controlled by three computers.

If a car is equipped with daytime running lights DRL, you must first understand the working principles of these devices. For example, some daytime running lights cannot be turned on before the engine is started; There are also some daytime running lights that cannot function properly even if the engine is started if the parking brake has not been cancelled. If the vehicle is equipped with light controlled lights (i.e. the system has the function of automatically turning on the front headlights when the external light is dim to a certain extent), it is advisable to check the working condition of the lights during the process of sensitivity from the weakest to the strongest state, and of course, do not ignore checking the automatic timer for turning off. If the system is equipped with a timer, please set it to the maximum delay.

If the front headlights are damaged, similar lighting fixtures are usually used for replacement. Some cars are equipped with high-intensity discharge (HID) headlights, which generate high-density light sources through high-voltage arc discharge generated by their pre designed electronic system. Note that regular quartz halogen bulbs cannot be used in this application. In addition, it is necessary to check whether there are cracks in the front headlights, because although surface cracks do not affect the lighting performance of the front headlights, moisture will seep into the lamp along the cracks, which will inevitably reduce the service life of the bulb.

The calibration of the illumination direction of the front headlights should also be included in the maintenance project list, because in order to ensure the maximum safety of the driver's driving, the front headlights must be able to provide good forward illumination for the driving vehicle.

While grasping the key, it is also important not to forget to inspect other lighting systems, such as turn signals, license plate lights, side lights, parking lights, reversing lights, and brake lights (including the middle high mounted brake light CHMSL). In addition, many vehicles also use fog lights as standard equipment or popular optional components. Fog lights are generally installed in lower positions on the car, making them highly susceptible to damage from rocks. When maintaining them, in addition to checking the lighting system itself, cracks in the headlights should not be ignored.