ParkAvenue 1997-1999

Exterior Lighting 1

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Fog & Driving Lights



Aiming

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

  1. Park the car on a level surface, at least 25 ft. (7.6m) from a wall that is perpendicular to the ground surface. Make sure there is no excess weight in the trunk, unless you normally travel with that amount of weight in the car. Bounce the car a few times to settle the suspension.
  2.  
  3. Measure and record the distance from the ground to the center of each fog light lens.
  4.  
  5. Turn the fog lights on and adjust so the hot-spots (lit area of most concentrated intensity) are 4 in. (10cm) below the height of the lenses. The ADJUSTING screw is located at the top right corner of the fog light.
  6.  

Removal & Installation

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the fog lamp-to-bumper assembly retaining screws. Be careful not to disturb the adjusting screw.
  4.  



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Fig. Unfasten the 2 Torx® fog light retaining screws (1), making sure not to disturb the adjusting screw (2)

  1. Squeeze the bulb and socket assembly retaining clip prongs inward, and pull the bulb and socket from the rear of the fog lamp.
  2.  



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Fig. Squeeze the bulb and socket retaining clip prongs inward ...



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Fig. ... then pull the bulb from the rear of the fog lamp

  1. Unplug the fog lamp electrical connector.
  2.  



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Fig. Unfasten the fog lamp electrical connector

  1. Install the assembly, retaining bolts and connect the negative battery cable.
  2.  

Front Turn Signal & Parking Lights



Removal & Installation
  1. Depending on the vehicle and bulb application, either unscrew and remove the lens, or disengage the bulb and socket assembly from the rear of the lens housing.
  2.  



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Fig. The front turn signal/parking light bulb can usually be accessed from behind



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Fig. Depress and twist this type of bulb counterclockwise, then pull the bulb straight from its socket

  1. To remove a light bulb with retaining pins from its socket, grasp the bulb, then gently depress and twist it 1 / 8 turn counterclockwise, and pull it from the socket.
  2.  



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Fig. For the turn signal/parking light bulb, carefully push the bulb in and turn it counterclockwise in order to unlock it ...



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Fig. ... then carefully remove the bulb from the socket

To install:

  1. Before installing a light bulb into the socket, ensure that all electrical contact surfaces are free of corrosion or dirt.
  2.  

Before installing the light bulb, note the positions of the two retaining pins on the bulb. They will likely be at different heights on the bulb, to ensure that the bulb is installed correctly. If, when installing the bulb, it does not turn easily, do not force it. Remove the bulb and rotate it 180 degrees from its former position, then reinsert it into the bulb socket.

  1. Insert the light bulb into the socket and, while depressing the bulb, twist it 1 / 8 turn clockwise until the two pins on the light bulb are properly engaged in the socket.
  2.  
  3. To ensure that the replacement bulb functions properly, activate the applicable switch to illuminate the bulb which was just replaced. If the replacement light bulb does not illuminate, either it too is faulty or there is a problem in the bulb circuit or switch. Correct if necessary.
  4.  
  5. If applicable, install the socket and bulb assembly into the rear of the lens housing; otherwise, install the lens over the bulb.
  6.  

Headlights



Aiming

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999

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


CAUTION
About once a year, when the headlights are replaced or any time front end work is performed on your vehicle, the headlight should be accurately aimed by a reputable repair shop using the proper equipment. Headlights not properly aimed can make it virtually impossible to see and may blind other drivers on the road, possibly causing an accident. Note that the following procedure is a temporary fix, until you can take your vehicle to a repair shop for a proper adjustment.

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.

Horizontal and vertical aiming of each headlamp assembly is provided by two adjusting screws which move the housing 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 by 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 vehicle on a level surface, with the fuel tank about 1 / 2 full 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 (7.6m) from the wall.
  2.  



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Fig. Location of the aiming screws on most vehicles with sealed beam headlights



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Fig. Dual headlight adjustment screw locations - one side shown here (other side should be mirror image)



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Fig. Example of headlight adjustment screw location for composite headlamps

  1. 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.
  2.  
  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 vehicle may be used. Although marking all four positions is advisable, marking one position from each light should be sufficient.
  4.  



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Fig. Low beam headlight pattern alignment



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Fig. High beam headlight pattern alignment

  1. If neither beam on one side is working, and if another like-sized vehicle is available, park the second one in the exact spot where the vehicle was and mark the beams using the same-side light. Then switch the vehicles so the one to be aimed is back in the original spot. It must be parked no closer to or farther away from the wall than the second vehicle.
  2.  
  3. Perform any necessary repairs, but make sure the vehicle 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.
  4.  
  5. Have the headlight adjustment checked as soon as possible by a reputable repair shop.
  6.  

Removal & Installation

Specific to:

Buick LeSabre 1986-1999

Buick Park Avenue 1996-1999

Oldsmobile 88 1992-1999

Oldsmobile Delta 88 1986-1988

Oldsmobile LSS 1996-1999

Pontiac Bonneville 1987-1999


CAUTION
Halogen bulbs contain gas under pressure. Handling the bulbs incorrectly could cause it to shatter into flying glass fragments. Do NOT leave the light switch ON. Always allow the bulb to cool before removal. Handle the bulb only by the base; avoid touching the glass itself.

  1. Open the vehicle's hood and secure it in an upright position.
  2.  
  3. Remove headlight assembly or headlight assembly covers, as necessary for access to the bulbs at the rear of the headlight assembly.
  4.  
  5. If assembly is removed from car, place on towel to protect the lens surface. If you can reach the back of the bulb assembly you don't need to remove the lens assembly. Some headlamp bulbs use a lockring. If your car has a lockring around the bulb, unfasten the locking ring which secures the bulb and socket assembly, then withdraw the assembly rearward.
  6.  
  7. Grasp the connector assembly, turn to align tabs and remove the bulb assembly.
  8.  



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Fig. You must turn the bulb assembly to align the tabs, then pull the bulb and connector rearward



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Fig. Pull the bulb and connector assembly rearward, holding it by the base, NOT by the glass

  1. Remove the wire connector from the light bulb and turn the bulb out of the headlight assembly.
  2.  



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Fig. Holding the bulb by its base, unplug it from the electrical connector



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Fig. Exploded view of a common headlight bulb replacement

To install:

  1. Before installing a light bulb into the socket, ensure that all electrical contact surfaces are free of corrosion or dirt.
  2.  
  3. Line up the replacement headlight bulb with the socket. Firmly push the bulb onto the socket until the spring clip latches over the bulb's projection.
  4.  


WARNING
Do not touch the glass bulb with your fingers. Oil from your fingers can severely shorten the life of the bulb. If necessary, wipe off any dirt or oil from the bulb with rubbing alcohol before completing installation.

  1. To ensure that the replacement bulb functions properly, activate the applicable switch to illuminate the bulb which was just replaced. (If this is a combination low and high beam bulb, be sure to check both intensities.) If the replacement light bulb does not illuminate, either it too is faulty or there is a problem in the bulb circuit or switch. Correct if necessary.
  2.  

High Mount Brake Light



Removal & Installation

Depending upon the vehicle, the center high-mount brake light may be accessed from outside the vehicle, through the trunk, or through the passenger compartment.

  1. Remove the center high-mount bracket light lens retaining screws.
  2.  



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Fig. Use a screwdriver to unfasten the center high-mount lens retaining screws ...

  1. Remove the lens in order to get to the bulbs.
  2.  



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Fig. ... then remove the lens for access to the bulbs

  1. Carefully pull the bulb away from its retaining clip contacts.
  2.  



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Fig. Pull the light bulb from the retaining clips

  1. Installation is the reverse of the removal procedure. Before installing the lens, make sure the brake light operates properly by having an assistant depress the brake pedal.
  2.  

License Plate Lights



Removal & Installation
  1. Remove the license plate light retaining screws.
  2.  



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Fig. Unfasten the license plate light retaining screws

  1. Carefully lower the license plate light assembly. Disengage the bulb and socket from the lens.
  2.  



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Fig. Lower the assembly, then twist and unlock the bulb and socket from the lens

  1. Carefully pull the bulb straight out of the socket.
  2.  



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Fig. Remove the bulb by pulling it straight out of the socket

  1. Installation is the reverse of the removal procedure. Before raising the assembly into position, turn on the headlights, and check that the license plate bulb(s) illuminate.
  2.  

Rear Turn Signal, Brake & Parking Lights



Removal & Installation
  1. Most rear lamps can be accessed from inside the trunk. Open trunk and look for access past the carpet.
  2.  
  3. By pulling back the carpet or removing the large plastic carpet retaining nuts, you can see the back of the light assembly.
  4.  



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Fig. Once the carpet is pulled down, you can see the retaining wingnuts which must be removed to access the rear bulbs

  1. If you can reach the bulb from inside the trunk, you don't need to remove the lens assembly to replace the bulbs. But, if you can't reach the bulb and connector assembly, you may need to remove the lens assembly.
  2.  
  3. If necessary, remove the tail light panel screws and the lens assembly.
  4.  



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Fig. Carefully pull the rear light assembly away from the vehicle for access to the bulbs

  1. You can now simply turn the bulb connector assembly counterclockwise and remove it from the lens housing.
  2.  



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Fig. Depress the bulb and socket retaining tabs, turn the socket ...



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Fig. ... then pull the bulb and socket from the rear of the lens



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Fig. Carefully press the bulb in and twist it approximately 1/8 turn counterclockwise to remove it from the socket

To remove the bulb, turn the twist lock socket (at the rear of the housing) counterclockwise 1 / 4 turn, then remove the socket with the bulb; replace the bulb if defective.

To install:

  1. Install the bulb in the socket.
  2.  
  3. Check that the connector is properly connected to the bulb and try the lights. Don't assemble everything until you are certain the bulb works. If the bulb doesn't work, check the grounds and use a 12 volt test light to make certain you have power to the bulb.
  4.  
  5. When you're sure the lights work, install the bulb into the lens housing.
  6.  
  7. If removed, install the lens housing and carpeting.
  8.  

 
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