THE BEECHMONT CREST AUTOMOTIVE LEARNING ZONE
AUTOMATIC HEADLAMP SYSTEM
An automatic headlamp system dims the vehicle’s headlamps when another vehicle approaches from the front. Automatic headlamp systems consist of a photosensor, relay, and amplifier.
The photosensor is mounted in the front of the vehicle (often in the grille region). When the sensor is exposed to light, it produces a small amount of electric current. The current operates the relay, which dims the vehicle’s high-beams as the oncoming car approaches.
This is a safety feature, as the system prevents the car’s headlamps from momentarily blinding the driver of the other vehicle.