<!-- from fixya rte -->How do I adjust headlight beams? - 2003 Toyota Tundra

Turn on your headlights and locate the two adjustment holes that have the adjustment screws inside them on the sides of each headlight. The top hole has the vertical adjustment screw and the bottom hole has the horizontal adjustment screw. Turn the vertical screw clockwise to raise the beam and counterclockwise to lower; turn the horizontal screw clockwise to move the beam right and counterclockwise to move the beam left.

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Determine the type of headlights you have on your car. You can only adjust composite headlights if they bolt to adjuster plates. For dual headlights, look on the headlights for four adjustment screws per side. Sealed beam units have interior adjustment screws under the hood.

4 Locate your adjustment screws. On sealed beam units, you may need to remove the trim screws and pull the trim off to reveal the Torx screws.

5 Begin with you headlights turned on to the low beam. Use a Torx screwdriver for sealed beam units and Phillips screwdrivers for other types of headlights.

Note: The headlights must be aimedcorrectly. Ifadjusted incorrectly they could blind the driver of an oncoming vehicle andcause a serious accident or seriously reduce your ability to see the road. Theheadlights should be checked for proper aim every 12 months and any time a newheadlight is installed or front end body work is performed. It should beemphad that the following procedure is only an interim step which willprovide temporary adjustment until the headlights can be adjusted by a properlyequipped shop. 1-Identify the exact location of the adjustment screws: a) On halogen bulb style headlights, theadjustment screws are located on top of the housing. b) On sealed beam style headlights, theinboard (vertical) adjustment screw and the upper (horizontal) adjustment screware accessible on the exterior of the vehicle. 2-There are several methods of adjusting the headlights. Thesimplest method requires masking tape, a blank wall and a level floor. 3-Position masking tape vertically on the wall inreference to the vehicle centerline and the centerlines of both headlights. 4-Position a horizontal tape line in reference to thecenterline of all the headlights. Note: It may be 'easier to position thetape on the wall with the vehicle parked only a few inches away. 5-Adjustment should be ,made with the vehicle parked 25 feetfrom the wall, sitting level, the gas tank half-full and no heavy load in the vehicle. 6-Starting with the low beam adjustment, position thehigh 1ntensity zone so it is two inches below the horizontal line and twoinches to the side of the headlight vertical line, away from oncoming traffic. Adjustmentis made by turning the top (sealed beam) or inner (aerodynamic type) adjustingscrew clockwise to raise the beam and counterclockwise to lower the beam. The adjusting screw on the side should beused in the same manner to move the beam left or right. 7-With the high beams on, the high intensity zone shouldbe vertically centered with the exact center just below the horizontal line. Note: It may not be possible to positionthe headlight aim exactly for both high and low beams. If a compromise must be made,keep in mind that the low beams are the most used and have the greatest effecton safety. Have the headlights adjusted by a dealerservice department or service station at the earliest opportunity -

There are two adjustment points (screws). For example left headlight: you will see one point near the end of left wing, at bottom side through a wing hole. This is for vertical plane headlight beam adjustment (up-down). Another one point is against water radiator side. This is for horizontal plane headlight beam adjustment (left-right).

Park your vehicle on level ground with the headlights near a garage door or wall. A good distance is 2-3 feet away from the wall or door. The location must be perfectly level and flat at a distance of 10 to 25 feet away from the door or wall.
Switch on the low headlight beams and mark the horizontal and vertical centerlines of each headlight beams on the wall using masking tape. This will mark the center of each beam with a +. The marking will tell you where exactly the headlight beams should be centered from a distance.

Move the vehicle back about 10 to 25 feet away from the garage door or the wall.

Keep the headlights on the low beam setting.
Use the markings you made on the wall or garage door to, check where the light shines and see if the centerlines still match up with the masking tape marks. If the centerlines of the two beams do not align with the tape marks, you can adjust one or both sides as needed.

Make the necessary adjustments with the lights still on while watching the light beams on the wall and your marks.
Turning the top adjusting screws in a clockwise direction will raise the beam while counterclockwise turn will lower it.

Turning the side adjuster screws will adjust the lights to the left or right.

Continue the adjustments until the center of the light beams are aligned with the tape marks. Then adjust the vertical alignment of both beams slightly below the marks on the wall. This will assure that the lights are tilted slightly downward so they won’t blind approaching motorist.

The will align bot lights, the high and low sine both are connected to the same headlight!!

The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.

AIMING THE HEADLIGHTS

The headlights must be properly aimed to provide the best, safest road illumination. The lights should be checked for proper aim and adjusted as necessary. Certain state and local authorities have requirements for headlight aiming; these should be checked before adjustment is made.

CAUTION About once a year, when the headlights are replaced or any time front end work is performed on your vehicle, the headlight should be accurately aimed by a reputable repair shop using the proper equipment. Headlights not properly aimed can make it virtually impossible to see and may blind other drivers on the road, possibly causing an accident. Note that the following procedure is a temporary fix, until you can take your vehicle to a repair shop for a proper adjustment.
Headlight adjustment may be temporarily made using a wall, as described below, or on the rear of another vehicle. When adjusted, the lights should not glare in oncoming car or truck windshields, nor should they illuminate the passenger compartment of vehicles driving in front of you. These adjustments are rough and should always be fine-tuned by a repair shop which is equipped with headlight aiming tools. Improper adjustments may be both dangerous and illegal.
For most of the vehicles covered by this guide, horizontal and vertical aiming of each sealed beam unit is provided by two adjusting screws which move the retaining ring and adjusting plate against the tension of a coil spring. There is no adjustment for focus; this is done during headlight manufacturing.
Because the composite headlight assembly is bolted into position, no adjustment should be necessary or possible. Some applications, however, may be bolted to an adjuster plate or may be retained by adjusting screws. If so, follow this procedure when adjusting the lights, BUT always have the adjustment checked by a reputable shop.
Before removing the headlight bulb or disturbing the headlamp in any way, note the current settings in order to ease headlight adjustment upon reassembly. If the high or low beam setting of the old lamp still works, this can be done using the wall of a garage or a building:

1. Park the vehicle on a level surface, with the fuel tank about 1 / 2 full and with the vehicle empty of all extra cargo (unless normally carried). The vehicle should be facing a wall which is no less than 6 feet (1.8m) high and 12 feet (3.7m) wide. The front of the vehicle should be about 25 feet from the wall.

Fig. : Location of the aiming screws on most vehicles with sealed beam headlights




Fig. : Dual headlight adjustment screw locations-one side shown here (other side should be mirror image)



Fig. : Example of headlight adjustment screw location for composite headlamps

1. If aiming is to be performed outdoors, it is advisable to wait until dusk in order to properly see the headlight beams on the wall. If done in a garage, darken the area around the wall as much as possible by closing shades or hanging cloth over the windows.
2. Turn the headlights ON and mark the wall at the center of each light's low beam, then switch on the brights and mark the center of each light's high beam. A short length of masking tape which is visible from the front of the vehicle may be used. Although marking all four positions is advisable, marking one position from each light should be sufficient.

Fig. : Low-beam headlight pattern alignment



Fig. : High-beam headlight pattern alignment

1. If neither beam on one side is working, and if another like-sized vehicle is available, park the second one in the exact spot where the vehicle was and mark the beams using the same-side light. Then switch the vehicles so the one to be aimed is back in the original spot. It must be parked no closer to or farther away from the wall than the second vehicle.
2. Perform any necessary repairs, but make sure the vehicle is not moved, or is returned to the exact spot from which the lights were marked. Turn the headlights ON and adjust the beams to match the marks on the wall.
3. Have the headlight adjustment checked as soon as possible by a reputable repair shop.

Hope helped with this information. Good luck (remember rated this help).

two screws on each headlight control the direction the headlights are aimed. One screw, usually at the top but sometimes below the headlight, adjusts the headlight up and down. The other screw, located to one side, controls the headlight from right to left. Turning the appropriate screw one direction or the other will change the direction the headlight points.
In order to aim your headlights you need to have a flat vertical surface you can aim your headlights at in front of a level surface on which to park the car. If your driveway is level your garage door is the perfect place to aim your headlights.
The tools you will need for this job are simple. Masking tape is used to mark where the headlights are to be aimed and a screwdriver is needed to adjust the headlights. A tape measure will be necessary to measure the distance of the vehicle to the surface you're using to check the aim and to measure the up and down distances from your marks.
To start you will want to pull your car quite close to the surface you are using to aim your headlights. This is done to allow you to mark, with the masking tape, where the headlights are on the car. With the car right up against the vertical surface, and your low beam headlights on, the center of the beams will be directly in front of the headlights. Use your masking tape to mark straight across where the headlights are shining. Use short pieces of masking tape to mark vertically the center of the low beams.
, back your car about 25 feet away to check the alignment of the headlights. The brightest spot on your low beams should be about two inches below the masking tape and slightly to the right of the vertical marks. Use the adjustment screws to move the beams up and down, and right and left, until the headlights are aimed properly.
If your car only has two headlights, that's all you need to do. With the high beam lights integrated into the single headlight there is no further adjustment possible. If you have a four-headlight system you will next need to adjust your high beams. Switch to your high beams and adjust them so they shine just below the line and are centered between your two vertical marks.

good luck

The adjustment screws/nuts should be located either on the top of the headlamp assembly, behind the headlamp assembly, or near the frame rail by the radiator support.

You will have vertical adjustment screws for each independent beam (separate highs and separate lows, but will be same screw if highs and lows are the same bulb). You may also have additional horizontal adjustment screws as well

Park your car on a level ground 30 feet from a wall and measure the height from the ground to the bulb and mark on a wall (do this for highs beams and low beams if the bulbs are separate, if highs and lows are the same bulb, only do it for the lows)

For Low Beams: If the headlights read VOR, then aim the brightest part or cutoff part just below the mark on the wall. If it says VOL or nothing, aim them 2 inches below the mark on the wall.

For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.