Automatic Light Control

With the Ignition SW turned 5GON, the current flows to TERMINAL 3 of the Automatic Light Control sensor through ECU-IG fuse voltage is applied at all times to TERMINAL 4 of the Automatic Light Control sensor through DOME fuse, and to TERMINAL 10 of the Automatic Light Control sensor through the Headlight relay coil.

AUTOMATIC LIGHT CONTROL
When the Light Control SW is in auto position, if the Automatic Light Control sensor detects a decrease in the ambient light (To Between 80 and 400 Lux), the Automatic Light Control sensor is activated. About 5 Seconds after it is activated, current flows from TERMINAL 9 of the sensor to TERMINAL 15 of the light control SW to TERMINAL 16 to GROUND, lighting up the Headlights and Taillights.
If the ambient light drop below 80 Lux, the Automatic Light Control sensor is activated and about 3 Seconds later current flows from TERMINAL 9 of the sensor to TERMINAL 15 of the Light Control SW to TERMINAL 16 to GROUND, Lighting up the Headlights and Taillights.
When the Light Control SW is at Auto position and activation of the Automatic Light Control sensor has turned ON the Headlights and Taillights, if the Automatic Light Control sensor detects Ambient Light above 800 Lux, the sensor is turned OFF after about 5 Seconds. So the current from TERMINAL 9 of the sensor to TERMINAL 15 of Light Control SW stop, and the Headlights and Taillights turn OFF.