Here's a general procedure, but always consult your owner's manual for the precise location and adjustment instructions specific to your vehicle:
1. Park on a level surface: Ensure your car is parked on a flat, level surface at least 25 feet away from a wall or screen.
2. Locate the adjustment screws: You'll need to open the hood. The headlight adjustment screws are usually located on the back of each headlight housing. They're often small and Phillips-head or similar. You might need a flashlight to see them clearly. They control vertical (up/down) and sometimes horizontal (left/right) adjustment.
3. Identify the screws: There should be at least one screw controlling vertical adjustment. Look for markings or labels that might indicate "up," "down," or show the direction of adjustment. Sometimes there's a separate screw for horizontal adjustment as well.
4. Mark the starting position: Before adjusting anything, lightly mark the current position of the screws with a marker or tape, in case you need to revert.
5. Adjust the headlights: Turn the screws slightly to adjust the beam. Typically, turning a screw clockwise raises the beam, while counter-clockwise lowers it. Adjust in small increments and frequently check the beam pattern on the wall or screen to avoid over-adjustment.
6. Check the beam pattern: After each small adjustment, check the beam's position on the wall or screen. Aim for a properly focused beam that illuminates the road ahead without blinding oncoming drivers. The ideal pattern should show a clearly defined cutoff line between the illuminated and unilluminated areas.
7. Repeat for both headlights: Repeat steps 5 and 6 for both the left and right headlights. Make sure both headlights are aligned properly.
8. Refer to your owner's manual: The most accurate and safe way to adjust your headlights is to follow the instructions provided in your 1999 Mazda 626 owner's manual. It will contain specific diagrams and information for your model.
Important Considerations:
* If you're uncomfortable working on your car, take it to a qualified mechanic. Improper headlight adjustment can be dangerous.
* Wear gloves to avoid scratching the headlight housings.
* Don't over-tighten the screws.
If you can't find the adjustment screws after consulting your owner's manual, a visit to a mechanic is highly recommended. There might be other factors affecting your headlight alignment.
