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Ask Hammer Time Your Own Question

Hammer Time
Hammer Time, L1 Master Technician
Category: Car
Satisfied Customers: 4942
Experience:  ASE Mastertech with Adv level Engine performance cert.
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1992 Chevy Lumina: I adjust my headlights..Chevrolet

Customer Question

How do I adjust my headlights on a 1992 Chevy Lumina. XXX@XXXXXX.XXX

Optional Information:
1992 Chevrolet lumina 3.1

Already Tried:
n/a





Submitted: 8 years ago.
Category: Car
Expert:  Hammer Time replied 8 years ago.

HEADLIGHT AIMING


The headlights must be properly aimed to provide the best, XXXXX XXXXX 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.


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 information, 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 used 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 car on a level surface, with the fuel tank about 1/2full 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.



  2. 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.



  3. 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 truck may be used. Although marking all four positions is advisable, marking one position from each light should be sufficient.



  4. If neither beam on one side of the vehicle is working, and if another like-sized car is available, park the second car in the exact spot where the vehicle was and mark the beams using the same-side light on that truck. Then switch the cars so the one to be aimed is back in the original spot. The car must be parked no closer to or farther away from the wall than the second vehicle.



  5. Perform any necessary repairs, but make sure the car 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.



  6. Have the headlight adjustment checked as soon as possible by a reputable repair shop.

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