Vertical aim adjustment
HORIZONTAL AIM IS NOT REQUIRED FOR THIS VEHICLE AND IS NON-ADJUSTABLE.
uses a bubble level to aim the headlights.
Check the following items before headlight aim inspection: § Be sure that the body around the headlight is not deformed. § Park the vehicle on a level spot. § The driver gets into the driver's seat and puts the vehicle in a state ready for driving (with a full tank). § Bounce the vehicle several times. Adjust the headlight in vertical alignment: § Using adjusting screw, adjustment the headlight aim to within the specifications. § Make sure the gauge bubble is within the acceptable range. Note: If the gauge bubble is outside the acceptable range, check that the vehicle is parked on a level spot. Readjust the headlight aim after parking the vehicle on a level spot Adjust the headlight in horizontal alignment: § Using adjusting screw, adjust the headlight aim to within the specifications. § Using adjusting nut, adjust the "0" back to the mark.
Bring to a shop that does state safety inspections
You do the smart thing and drive your 2004 Ford Focus to WalMart (not your Ford dealer...your Ford dealer will charge you $35.00 a headlight), and you let WalMart Tire and Lube men adjust your headlights for $5.00. You're done. Simple as that. For those who want to waste time but save a buck, aim your headlights at a wall from 25 feet away, find the adjusting screws near each headlight, and turn each screw until you achieve what you're looking for. The beams should be no more than 2.1" higher or lower than your headlights are from the ground.
The headlights of a 2001 Dodge Caravan are aimed by turning the adjustment screws on the back of the headlight assembly. They allow for vertical and horizontal adjustments.
There should be a screw just over the top of the headlight (you're going to have to get down on your hands and knees to see it). Screw it IN (clockwise) to adjust the aim higher. Park about ten ft. away from a building, on level ground. Measure from the ground to the center of the headlight. Now make a mark on the building at that height in front of the headlight. Adjust the headlight so it centers on that mark.
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.
To adjust the beam horizontally (aim it left or right), first equip yourself with a star screwdriver with a longish shaft. Open the bonnet, and look just behind the headlight cluster for a hole in the metalwork through which you can slip the screwdriver shaft to engage a screwhead on the headlight cluster itself. Turning the screw clockwise aims the light further to the right, while turning it anticlockwise aims the light further to the left.
Headlight effectiveness and speed relationship is hypothetical. What matters are the correct headlight aim, road, and driving conditions. First, your vehicle headlight's aim is preadjusted at the factory. If is has been replaced, the aim had to be readjusted. Check your owner's manual. Second, road conditions has a bearing on headlight effectiveness. Asphalt road are darker and harder for night vision while concrete roads tends to be lighter and better for night vision. Third, headlight aim and speed relationship is only effective when the road is straight. On windings, twists, turns, inclines, uphills, downhills, and curves, the driver need to adjust to it. A good rule of thumb is to adjust your driving to the conditions you're in. If you can no longer see the road ahead clearly with your headlights, it's probably time to slow down a bit.
There are small tork screws on the plastic headlight housings. It is kind of a pain to get to them.
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.
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