The headlights must be properly aimed to provide the best, safest road illumination. The lights should be checked for proper aim, and adjusted if necessary, after installing a new sealed beam unit or if the front end sheet metal has been replaced. The headlamps should be aimed by a professional with a special alignment tool. Certain state and local authorities may require professional adjustment, but use the procedure below for temporary adjustments.
NOTE: The vehicle's fuel tank should be about half full when adjusting the headlights. Tires should be properly inflated, and if a heavy load is carried in the trunk or in the cargo area of station wagons, it should remain there.
Horizontal and vertical aiming of each sealed beam unit is provided by two adjusting screws, which move the mounting ring in the body against the tension of the coil spring.