H3 2006

Exterior Lighting

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Headlights



Aiming

The vehicle has a visual optical headlamp aiming system. The aim has been preset at the factory and should need no further adjustment.

However, if the vehicle is damaged in an accident, the headlamp aim may be affected and adjustment may be necessary.

If oncoming vehicles flash their high beams at you, this may also mean the vertical aim needs to be adjusted.

The vehicle should be properly prepared as follows:



The vehicle should be placed so the headlamps are 25 ft. (7.6 m) from a light colored wall or other flat surface.
 
The vehicle must have all four tires on a level surface which is level all the way to the wall or other flat surface.
 
The vehicle should be placed so it is perpendicular to the wall or other flat surface.
 
The vehicle should not have any snow, ice, or mud on it.
 
The vehicle should be fully assembled and all other work stopped while headlamp aiming is being performed.
 
The vehicle should be normally loaded with a full tank of fuel and one person or 160 lbs (75 kg) sitting on the driver's seat.
 
Tires should be properly inflated.
 
The spare tire is in its original location in the vehicle.
 

  1. To adjust the vertical aim, perform the following procedure:
    1. Find the aim dot on the lens of the headlamp.

      Click image to see an enlarged view

      Fig. Find the aim dot on the lens of the headlamp

    2.  
    3. Measure the distance from the ground to the aim dot on the headlamp. Record the distance.
    4.  
    5. At the wall or other flat surface, measure from the ground upward the recorded distance from Step 2 and mark it.
    6.  
    7. Draw or tape a horizontal line the width of the vehicle at the wall or other flat surface where it was marked it Step 4.
      NOTE
      Do not cover a headlamp to improve beam cut-off when aiming. Covering a headlamp may cause excessive heat build-up which may cause damage to the headlamp.

    8.  

  2.  
  3. Turn on the headlamps and place a piece of cardboard or equivalent in front of the headlamp not being aimed. This should allow only the beam of light from the headlamp being aimed to be seen on the flat surface.
  4.  
  5. Locate the vertical headlamp aiming screws, which are under the hood near each headlamp assembly.
    NOTE
    The adjustment screw can be turned with an E8 Torx socket or T15 Torx screwdriver.



    Click image to see an enlarged view

    Fig. Locate the vertical headlamp aiming screws

  6.  
  7. Turn the vertical aiming screw until the headlamp beam is aimed to the horizontal tape line. If you turn it clockwise, it will raise the beam and if you turn it counterclockwise, it will lower the beam.
  8.  
  9. Repeat steps 6 and 7 for the opposite headlamp.
  10.  

Removal & Installation
Assembly

Specific to:

Hummer H3 2006-2010

  1. Remove the front grille.
  2.  
  3. Remove the bolt securing the pencil brace bracket to the rear edge of the headlamp assembly.
  4.  
  5. Gently move the fender pencil brace away from the headlamp composite which is being serviced.
  6.  
  7. Remove the 3 headlamp assembly bolts.

    Click image to see an enlarged view

    Fig. Exploded view of the headlamp assembly showing the mounting bolts (1), support bracket bolt (2), and the headlamp (3)

    1. Support the headlamp assembly when removing the bolts.
    2.  
    3. Pull the lamp assembly slightly forward.
    4.  
    5. Disconnect the electrical connector from the forward lamp harness connector.
    6.  
    7. Disconnect the jumper harness connector from the fender flare turn signal lamp.
    8.  

  8.  
  9. Remove the headlamp support bracket bolt.
    1. Rotate the bracket upward to allow access to remove headlamp assembly.
    2.  
    3. Rotate the outer edge of the headlamp outward in order to remove the lamp assembly from the grille assembly support.
    4.  

  10.  
  11. Remove the headlamp assembly.
    1. Pull the headlamp assembly forward to remove.
    2.  

  12.  
  13. Installation is the reverse of removal.
  14.  

Bulb

Specific to:

Hummer H3 2006-2010

  1. Open the hood and secure the prop rod.
  2.  
  3. Disconnect the electrical connector to the headlamp bulb socket.
  4.  
  5. Turn the bulb socket counterclockwise to remove.
  6.  

Tail Lights



Removal & Installation
Assembly

Specific to:

Hummer H3 2006-2010

  1. Open the endgate in order to access the left rear tail lamp assembly screws.
  2.  
  3. Remove the 2 mounting screws for the tail lamp housing.

    Click image to see an enlarged view

    Fig. Tail lamp housing assembly showing the mounting screws (1), tail lamp assembly (2), and the electrical connector (3)

  4.  
  5. Pull the tail lamp housing outward in order to release the exterior side pin retainers.
  6.  
  7. Disconnect the tail lamp electrical connector.
  8.  
  9. Remove the tail lamp housing.
  10.  
  11. Installation is the reverse of removal.
  12.  

Bulb

Specific to:

Hummer H3 2006-2010

  1. Remove the tail lamp assembly.
  2.  
  3. Turn the lamp socket counter-clockwise a quarter turn to remove from the housing.
  4.  
  5. Pull the bulb straight from the lamp socket.
  6.  
  7. Installation is the reverse of removal.
  8.  

 
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