What does 'auto' mean for car lights?
1 Answers
AUTO stands for automatic, meaning automatic on and off. After rotating the light switch to this position, for example, when passing through tunnels, on cloudy days, or in any dimly lit areas, the car lights will automatically turn on. When the lighting conditions become sufficient, the lights will subsequently turn off. Additional information: 1. When the light dims while driving, the headlights will automatically turn on, and when the light brightens, they will automatically turn off. It's worth mentioning that many people mistakenly believe that 'automatic headlights' are specifically designed for tunnels, which is not the case. The activation of automatic headlights has a delay—the headlights will only turn on automatically within a few seconds after the light sensor detects dimming. According to traffic regulations, car headlights must be turned on before entering a tunnel, so manual activation is still required when passing through tunnels. 2. Sensors such as photoresistors (installed behind the rearview mirror, etc.) send electronic signals to the ECU (Electronic Control Unit, similar to a computer CPU) to inform it whether to turn the headlights on or off, or to switch between high and low beams. The ECU controls the headlight switch and beam changes. Thus, when driving in environments where the light suddenly dims, the headlights will automatically turn on and will turn off when the light is sufficient. Additionally, they may automatically switch between high and low beams during nighttime encounters with other vehicles.
