1999 Nissan Altima Owner's Manual - Page 172
1999 Nissan Altima Manual
Page 172 highlights
a. Keep all of the tires inflated to the correct pressure. b. Place the vehicle on level ground. c. See that the vehicle is unloaded (except for full levels of coolant, engine oil and fuel, and spare tire, jack, and tools). Have the driver or an equivalent weight placed in the driver's seat. ADJUSTMENT AFTER HEADLIGHT ASSEMBLY REPLACEMENT If the vehicle front body has been repaired and/or the headlight assembly has been replaced, check aiming. Use the aiming chart shown in the illustration. ● Upper edge and left edge of high intensity zone should be within the range shown at left. Adjust headlights accordingly. ● Dotted lines in the illustration show center of headlights. ''H'' : Horizontial center line of headlights ''WL'': Distance between each headlight center Low beam 1. Open the hood. 2. Adjust the vertical aim by turning the adjusting screw with a Phillips screwdriver. 3. Adjust the horizontal aim by turning the adjusting screw with a Phillips screwdriver. ADI1039 Do-it-yourself 8-23