How to Repair Car Headlights?
2 Answers
Headlight scratch repair requires professional products operated by skilled technicians at professional auto beauty shops. Generally, polishing and restoration procedures are used to repair the headlights, aiming to restore them to a smooth and even condition as much as possible. However, if the physical damage is severe, beauty treatments may not be successful, and it is necessary to assess the situation before deciding whether to sand the headlights. Below is an introduction to car headlights: 1. Composition of Car Headlights: Headlights consist of a lens cover, bulb, socket, reflector, lens, and light adjustment device. 2. Working Principle of Car Headlights: The working principle of car headlights involves a central intelligent control chip that determines the brightness changes of the external environment based on a light sensor, thereby completing the operation of turning the lights on or off.
Last time my buddy's headlights suddenly went out, it was safer for him to pull over and find a professional shop for inspection. But if you encounter this issue daily, you can first check a few key points in the dark: unscrew the headlight rear cover and try replacing the bulb by hand. In most cases, a new bulb will do the trick—keeping an H4 bulb in the spare tire compartment is always a good idea. Be careful not to touch the glass part of the bulb directly, as oil residue can shorten its lifespan. If the bulb is fine, check the corresponding fuse in the fuse box—some cars have it behind the headlight switch. Use your phone's flashlight to inspect; a blown fuse's broken filament is obvious. For a quick fix, you can buy a fuse with the same amperage at a convenience store. If that doesn’t work, consider aging wiring connectors—older cars often have corroded, greenish wiring harnesses. Last time, I revived my old Santana’s headlights by sanding the contact points. If all else fails, don’t push it—using fog lights as temporary lighting at night is a safer alternative.
