Here's a general guide, but always refer to your owner's manual for the most accurate and safe procedure:
1. Safety First: Park your Previa on a level surface, at least 25 feet away from a wall or screen. Turn off the engine and let the headlights cool if they've been on. Engage the parking brake.
2. Locate the Adjustment Screws: Open the hood. Behind each headlight assembly, you'll find two adjustment screws. One screw controls vertical adjustment (up and down), and the other controls horizontal adjustment (left and right). They might be slotted screws or have a different design. They're often near the top or side of the headlight housing. A flashlight will likely be helpful.
3. Identify the Adjustment Screws: You might find markings near the screws (like "V" for vertical and "H" for horizontal), or you may have to deduce it by experimenting with small adjustments. Start with small adjustments – you can always make more.
4. Use a Screwdriver: Use the appropriate screwdriver (likely a Phillips or flathead) to carefully adjust the screws.
* Vertical Adjustment: Turning the vertical adjustment screw clockwise generally raises the beam, while counterclockwise lowers it.
* Horizontal Adjustment: Turning the horizontal adjustment screw will move the beam left or right. Clockwise usually moves the beam to the right, counterclockwise to the left.
5. Check the Beam Pattern: After each small adjustment, turn on your headlights (low beams) and check the pattern on the wall or screen. The goal is to have the headlights project a beam that is level and doesn't shine excessively high or to the sides, blinding other drivers. A properly adjusted beam will have a sharp cutoff line.
6. Repeat Adjustments: Make small adjustments, checking the beam pattern after each one, until the beam is correctly aligned.
7. Check Both Headlights: Repeat steps 3-6 for the other headlight. The beams should be symmetrical.
Important Considerations:
* Owner's Manual: The owner's manual is your best resource. It will show you exactly where the adjustment screws are located on *your* specific 1992 Toyota Previa.
* Professional Help: If you are uncomfortable working on your car, or if you're having trouble locating the screws, it's best to take your Previa to a qualified mechanic for headlight adjustment. Improper adjustment can lead to dangerous driving conditions.
* Wear Safety Glasses: Always wear safety glasses when working under the hood of a car.
* High Beams: Do not adjust the high beams, only the low beams.
This guide provides general information. Always prioritize safety and consult your owner's manual for detailed instructions specific to your 1992 Toyota Previa.
