1998 Mercury Mountaineer Owner Guide 1st Printing - Page 195

Maintenance and care Horizontal aim adjustment 1. With the hood open, locate the horizontal indicator and adjusting screw. They are located below the viewing hole at the rear of the headlamp assembly. 2. Use a 4mm wrench or socket to turn the horizontal adjusting screw until the "0" mark on the yellow dial lines up with the reference mark on the marker (as shown) when viewed directly from above. Vertical aim adjustment 1. Park the vehicle on a level surface. 2. With the hood open, locate the bubble level and vertical adjustment screw. The adjustment screw is located on the outboard side of the headlamp. D U 3. The "UP" and "DN" on the bubble indicate the directional change (up or down) of the vertical aim. 4. Use a 4 mm wrench or socket to turn the vertical adjusting screw clockwise or counterclockwise until the bubble is centered over the "0" mark. D U 195