Automatic Headlight Dimmer: Operation: Automatic

With system on automatic operation, lights will go to low beam whenever daylight, street light, or car light strikes the phototube. Driver may obtain high beam by overriding automatic control with a slight pressure on foot switch. Lights will return to automatic control when pressure is removed. Sensitivity is driver controlled with lever behind headlight switch and normal automatic operation is secured with pointer centered between "Off" and "Far" positions (rotating ring toward "Far" will increase sensitivity and cause headlights to switch to low beam when approaching car is farther away). Operation of Guide-Matic may be affected by reflective quality of road surfaces. To obtain furthest usable dimming distance, turn sensitivity control fully clockwise after lights dimmed for approaching car, then, after car has passed, rotate control counterclockwise slowly until lights just return to high beam.