Ford 2003 Mustang Workshop Manual page 3477

VOL type headlamps
7. For VOL type headlamps, there will be a distinct cutoff in the left portion of the beam pattern.
The edge of this cutoff should be positioned 50.2 mm (2 in) below the horizontal reference line.
1. Horizontal reference line.
2. Top edge of the beam pattern.
3. High intensity zone.
Mechanical Aiming
1. For the mechanical aiming procedure, refer to the appropriate mechanical headlamp aimer
instruction manual.