Open your hood. Look right above your headlights just inside the hood area, you'll see a small steel rod sticking up. To it's outside, against the fender is another one. They have tiny hex heads on them. Find a good fitting socket and adjust away. The fender side rod is in and out, the inside one is up/down.
there is no adjustments on the headlights.
Different models of Peterbilt have different headlight assemblies. We need to know which model you're referring to.
Specify what you mean.
Take it to the dealer, You don't have the proper tools to do this correctly. lol seriously? its a torx head screwdriver.. that's all that's necessary
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.
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.
You need special equipment to do this correctly. Take it to a dealer for this.
Take it to a dealer or a good body shop. You do not have the proper equipment to do this correctly.