2001 Mercury Cougar Owner Guide 2nd Printing - Page 257

Maintenance and care • A screen or wall with a reference line (as described below) is needed in order to adjust the vertical position of each lamp's light pattern cutĆoff line. The cutĆoff line is the line formed between the bright lower portion and the dark upper portion of each lamp's light pattern. (Fig. 1). Adjusting the vertical aim 1. The surrounding light level during the aiming process must be kept as low as possible (in a darkened enclosure or outside at night), as the light level has a major influence on the accuracy of the headlamp aim. 2. A flat vertical screen at least one meter wider than the vehicle is needed. A level surface on which to park the vehicle in front of the screen is also required. 3. Center the vehicle 7.6 meters in front of this screen (Figs. 3 and 4). 4. Measure the height of the low beam lamp center from the ground. Subtract 52 mm from this figure. Place a horizontal reference line on the wall at this height, masking tape works well for this. The line should be at least three meters long (Figs. 3 and 4). Fig. 2