Toyota 90981-04020 Sealed Beam Unit, No.1

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Another important factor car headlights must be properly aligned in a manner that will not blind other motorists on the road while at the same ensuring maximum visibility on the road. It is recommended that the proper aim should be checked after one year or any time the replacement of one or more headlight is done or there is a front-end body work done on the car. The adjustment procedure offers only a relative correction, and the person must wait until a specialist intervenes and uses the appropriate method. Early body style headlights feature an adjusting screw on top for up-and-down movement and one on the side for left-and-right movement, while late models have two screws: one for left-and-right attached to one of the sides of the garment and the other, for up-and-down located at the bottom of the garment. To align the headlights the following are needed, a blank wall at a distance of 25 feet in front of the vehicle and a level floor. When preparing and marking the wall, vertical masking tape should be positioned along the line of the car's centerline, as well as, centerline of the headlights; additionally, there has to be a horizontal tape line. It should be stationary, with some fuel in its tank although not full, and not carrying any bulky items. For low beam adjustment the HIGH INTENSITY ZONE should be set two inches below the nominal horizontal line and two inches right of the vertical lighter line adjustment screws. When high beams are on, the high intensity area should be slightly below the line horizontally though low beams are more important and commonly used for safety. It is recommended that one should see an expert to have the headlights realigned as soon as possible.

To begin, turn the headlights on and unplug the electrical connector from the headlight retractor control relay. Next, turn the headlights off; with the retractor control relay disconnected, the lights will stay in the up position. Remove the screws securing the headlight trim piece and take off the trim piece by unscrewing both screws on each side. Pull the headlight toward you and disconnect the spring located in the upper left corner using a suitable tool. Then, remove the four retaining screws for the headlamp bezel, take off the chrome bezel, and pull the light out far enough to reach behind it and unplug the electrical connector. After that, pull the headlight out and unplug the connector before finally removing the headlight. For installation, follow the reverse order of removal and ensure to adjust the headlights afterward.

Adjustment of the headlights should be carried out properly so that they do not dazzle other users or that they offer the right angles for best illumination while on the road. The headlights should be inspected for correct alignment at least once every year and whenever a headlight and or front end accessory is added or replaced. The adjustment process involves two screws: So there is one bar on top for the up and down motion and one on the side for the left and right motion. This type of adjustment is simple and necessitates only a blank wall, set twenty-five feet away from the vehicle, and a level floor. It is suggested that vertical marking on the wall should be done as far as possible from the vehicle and also with respect to the bisector of the vehicle width and both headlights and a horizontal marking line of masking tape should also be done. The vehicle should be stationary and should not be loaded; the tank of the vehicle should be half-full. Low beam adjustment should be set at the high intensity zone two inches below the horizontal line and two inches to the right of the vertical headlight line. For the sealed beam models there is a top screw which when turned clockwise will move the beam up and when turned anti clockwise, it will move the beam down.Similarly there is a side screw to move the beam leftward and rightward. For bulb-type headlights the top screw will shifted the assembly towards the right or left, while the bottom screw will tilt the assembly up or down. The high intensity zone should span just below the horizontal line while using the high beam In most scenarios, low beams are more applicable since they are safer for the drivers hence frequently used. One ought to take the car to a dealer's service department as soon as possible for the headlights to be properly aligned.

Installation is the reverse of removal.

Have the headlights adjusted by a dealer service department at the earliest opportunity.

Remove the four screws from the headlight retaining ring and take off the ring.