Sensor-Amplifier Vertical Aiming
Sensor Amplifier vertical aiming should be performed with car unloaded, trunk empty, gas tank at least half full, and tire pressure correct. Put car on a level floor and rock vehicle to equalize springs. Adjust vertical aiming screw at rear of bracket assembly (front of bracket assembly on Thunderbird) until the bubble is centered in the level.
NOTE:
Do not tamper with the screw at end of level.
Always make final adjustment while turning aiming screw clockwise.