Vehicle Preparation For Lamp Alignment

Check for and correct any burnt out bulbs.
If the vehicle is equipped with headlight leveling, be certain that the headlight leveling switch is in the 0 position.
Repair or replace any ineffective, worn or damaged body or suspension components that could hinder proper lamp alignment.
Verify proper tire inflation pressures.
Remove any accumulations of mud, snow or ice from the vehicle underbody and clean the front lamp lenses.
Verify that there is no load in the vehicle (cargo or passengers), except for the driver.
The fuel tank should be FULL. Add 2.94 kilograms (6.5 pounds) of weight over the fuel tank for each estimated gallon of missing fuel.
Verify correct vehicle suspension height.