Different models of Peterbilt have different headlight assemblies. We need to know which model you're referring to.
there is no adjustments on the headlights.
To set the headlights on a 1994 GMC truck, first park the vehicle on a level surface about 25 feet from a wall or garage door. Turn on the headlights and mark the center of the beam on the wall. Adjust the headlight aim using the vertical and horizontal adjustment screws located on the headlight assembly until the top of the beam is at or slightly below the mark you made. Ensure both headlights are aligned evenly for optimal visibility.
Specify what you mean.
uses a bubble level to aim the headlights.
A headlight leveling system adjusts the vertical aim of the headlights based on the position of the rear suspension. As you load the trunk of a car, bed of a truck, etc. the suspension is compressed to allow the vehicle to ride smoothly. This causes traditional headlights to aim higher. A headlight leveling system lowers the headlight beam to compensate for this allowing the driver to see the road clearly without blinding oncoming traffic.
To aim the headlights on a 2006 Buick Century, park the vehicle on a level surface about 25 feet from a wall. Measure the height of the headlight center from the ground and mark this height on the wall. Turn on the headlights and adjust the vertical aim using the adjustment screws located on the headlight assembly until the top of the light beam is aligned with the mark on the wall. Ensure the headlights are aimed properly to avoid blinding other drivers while providing optimal visibility.
To aim the headlights on a 2003 Nissan Pulsar N16, first park the vehicle on a level surface about 25 feet away from a wall. Turn on the headlights and mark the center of the light beam on the wall with tape. Adjust the vertical aim by turning the adjustment screws located on the headlight assembly until the top of the beam is aligned with the tape mark. Ensure the horizontal aim is correct by checking that the beams are centered relative to the vehicle's width.
Take it to the dealer and let them put there gauges on them to get them set right.
There are little black rods sticking up by the head lights that have a spot to put a screwdriver in. You turn these rods to aim the headlights correctly.
Park your vehicle approximately 15 feet from your garage door or another wall. Open the hood and on top of both of the headlights you will see adjustment screws. Rotating them will lower/raise the headlights
The are adjustment screws next to the headlight housings. To adjust the headlights either loosen or tight the screws. This will either raise or lower the headlight unit.
Aim Away from Face - 2008 was released on: USA: 2008 (First Take Film Festival)