Auto-On Headlights System Description

The auto-on headlights system works as follows.

With the ignition switch turned ON, the lighting switch turned to the "AUTO" position and the parking brake released, when it becomes dark the headlights and clearance lights are turned ON and when it becomes bright, both of these lights are turned OFF.

Fig 1: Identifying Auto-On Headlight Sensor, Headlight Switch & BCM Operation

Courtesy of SUZUKI OF AMERICA CORP.