What is the headlight in Subject 3?
3 Answers
The headlight in Subject 3 refers to turning on the low beam to provide illumination for the driver. The headlight, also known as the front headlamp, is installed on both sides of the front of the car and is used for road illumination during nighttime driving. There are two types: two-lamp and four-lamp systems. The lighting effect of the headlights directly affects nighttime driving operations and traffic safety. Usage requirements: When using the car, it is necessary to have good illumination while avoiding dazzling oncoming drivers. When using the headlights, the following points should be noted: Keep the headlight lens clean, especially when driving in rain or snow, as dirt and dust can reduce the headlight's illumination performance by 50%. Some models are equipped with headlight wipers and washers. When two cars meet at night, both should switch from high beam to low beam when they are 150 meters apart to ensure driving safety. To maintain the performance of the headlights, after replacing them or every 10,000 km driven, the headlight beam should be checked and adjusted. Regularly inspect the bulbs, wiring sockets, and grounding for oxidation or looseness to ensure good contact performance and reliable grounding. If the connections are loose, turning on the headlights may cause current surges due to circuit interruptions, which can burn out the filaments. If the connections are oxidized, the bulb brightness may decrease due to increased voltage drop at the connections.
I just passed Subject 3 and have firsthand experience to share. The headlamp refers to the brightest main lighting at the front of the vehicle. During the test, you need to rotate the lighting control stalk inside the car - turning it to the sun symbol position means it's on. When simulating night driving and hearing instructions like 'passing sharp curves at night', you must first ensure the headlamp is activated before switching between high and low beams. Many students stumble at this step. Actually, after starting the engine, the dashboard displays a blue symbol for high beams and green for low beams - memorizing these colors ensures smooth operation. The instructor repeatedly emphasized not to confuse them with fog lights (marked with wavy lines), which are basically unnecessary for our test.
As someone who frequently accompanies students during driving practice, the headlight refers to the low beam mode within the headlight assembly. From a maintenance perspective, most exam vehicles nowadays use a combination switch control: rotating the knob at the end of the light lever to the 'low beam symbol' position (resembling a sideways 'D' letter) activates it. The key is to distinguish between the position lights (parking lights) and headlights—the former are dim red lights used when parked. During the exam's lighting simulation segment, such as upon hearing the 'nighttime meeting with another vehicle' instruction, you must switch the headlight from high beam to low beam within 3 seconds. This reaction time is particularly prone to causing failure.
