
Checking the steps of the lights is: 1. Keep the vehicle being inspected perpendicular to the screen or guide rail of the inspection instrument, with the headlights 3 meters away from the receiver of the inspection instrument; 2. Align the vehicle properly so that the inspection instrument is directly opposite the vehicle; 3. Turn on the headlights, use the headlight aligner to align the inspection instrument with the vehicle's headlights, then adjust the fixed screen to the same height as the headlights, ensuring the receiver coincides with the center of the headlight's diffuser lens surface; 4. Align the zero points of the left and right optical axis scales on the fixed screen with the reference pointer on the movable screen; 5. Move the receiver up, down, left, and right until the photometer reading reaches its maximum value. The optical axis deviation can then be determined based on the vertical scale value indicated by the reference pointer on the movable screen and the horizontal scale value indicated by the reference pointer on the fixed screen; 6. The luminous intensity of the headlights can be determined based on the photometer reading at this point.

When I first got my driver's license, I thought checking car lights was quite complicated. Now, I've figured out a simple and practical routine. First, park in a safe spot, turn off the engine, and make sure you won't move around. Then, start the engine and test all the light switches one by one. I begin by checking the headlights—both low and high beams—to see if they light up and assess their brightness. Next, I test the turn signals by activating them on both sides to observe if they blink properly. For the brake lights, I press the foot brake and have a friend stand behind the car to check if they illuminate. If no one's around, I drive close to a wall and use the reflection to confirm. Don’t forget to check the taillights and reverse lights while you're at it. The key takeaway is to make it a monthly habit—replace dim bulbs promptly to avoid discovering issues during long trips, which could compromise safety, especially at night when poor visibility increases accident risks. The whole process is quick and easy, requiring no specialized tools.

I make it a daily habit to check my car lights when driving my kids to school. After parking, I start the engine and ask my wife to help check if both the high and low beams of the headlights are working, if the turn signals blink at the right speed, and if the brake lights come on when pressed – these are the basics. Without family assistance, I simply start the car and check if the front lights are on and test the turn signal switch. For the brake lights, I often record them with my phone and review the footage to confirm they're working properly. The taillights also need inspection to ensure they're clear. From a safety perspective, driving at night with faulty lights is dangerous, especially in rainy or foggy conditions. Therefore, I do a quick check every two weeks. If I find any issues, like a burnt-out bulb or a blown fuse, I send the car for repairs to prevent bigger problems.

As a car enthusiast, I enjoy handling light inspection issues myself. Detailed steps make it more fun. Park and turn off the engine—safety first. Turn on the lighting system and check each external light: headlights on high and low beam modes to observe brightness, turn signal flashing frequency, brake light activation time, and the condition of tail lights and reverse lights. Open the hood to check if bulb connections are loose, clean the light covers to improve transparency, and inspect the corresponding fuses in the fuse box to ensure they're intact. If a fuse is blown, replace it carefully to avoid mistakes. Using a multimeter for voltage testing is more precise, but average car owners can opt for simpler methods to maintain stable light performance, reduce safety risks, and extend component lifespan.


