Chevrolet Impala

HI all.I have a 1990 Ford Ranger Ext Cab.I needed some weight for the winter, so Ive only put in about 300 lbs in the back, but Im getting people flashing me to turn my lights down, while they are down. How do you adjust the headlights on this truck?
Thanks : )
January 4, 2006.

There should be a phillips head screw in the center line of the light outside the circumfrence(sp) if its at the bottom of the light screw in (clockwise) to aim down. Ccw if the adjustment screw is at the top of the light. A back yard aim is, park six feet away from a wall messure center line hieght of the lights. Subtract one inch. Mark that line on wall turn on lihgts and adjust center of beam to that line hieght. And about one inch outward side to side. Good luck

Jan 5, 2006.