its been a while since i did mine but there is a hex shaped screw attached to the headlight assembly, open the hood and look down at the headlight assembly, i believe its 3/16" you will need 1/4"...
Headlamp Aiming
The adjusting screws control the horizontal and the vertical aiming of each headlamp assembly.
Both adjusting screws are in the radiator support. The location is not readily...