Headlamp Aiming Export, LH Rule of the Road
- Prepare the aiming screen
and the vehicle for headlamp aiming. Refer to
Headlamp Aiming
.
- Raise the hood.
- Raise the headlamps.
- Remove the headlamp adjustment screw plug from the headlamp bezel.
Reach under the headlamp bezel and push out the plug from behind.
- Turn ON the low beam lamps.
- Inspect the horizontal aim.
- Adjust the aim using the horizontal adjusting screw, to align
the break point (3) of the high intensity zone to the headlamp vertical centerline (1),
within the range of 38 mm (1.5 in) to the left (4) of the
lamp vertical centerline (1), to 38 mm (1.5 in) to the right
(5) of the lamp vertical centerline (1) on the aiming screen.
- Inspect the vertical aim.
- Adjust the aim using the vertical adjusting screw, to align the
upper edge of the beam horizontal cut off line 114 mm (4.5 in)
below (7) the headlamp horizontal centerline (2), within the range of
76 mm (3 in) below (8) the lamp horizontal centerline (2),
to 191 mm (7.5 in) below (6) the lamp horizontal centerline
(2) on the aiming screen.
- Install the headlamp adjustment
screw plug.
Push to secure.
- Turn OFF the headlamps.
- Lower the hood.
Headlamp Aiming Export, RH Rule of the Road
- Prepare the aiming screen
and the vehicle for headlamp aiming. Refer to
Headlamp Aiming
.
- Raise the hood.
- Raise the headlamps.
- Remove the headlamp adjustment screw plug from the headlamp bezel.
Reach under the headlamp bezel and push out the plug from behind.
- Turn ON the low beam lamps.
- Inspect the horizontal aim.
- Adjust the aim using the horizontal adjusting screw, to align
the break point (3) of the high intensity zone to the headlamp vertical centerline (1),
within the range of 38 mm (1.5 in) to the left (5) of the
lamp vertical centerline (1), to 38 mm (1.5 in) to the right
(4) of the lamp vertical centerline (1) on the aiming screen.
- Inspect the vertical aim.
- Adjust the aim using the vertical adjusting screw, to align the
upper edge of the beam horizontal cut off line 114 mm (4.5 in)
below (7) the headlamp horizontal centerline (2), within the range of
76 mm (3 in) below (8) the lamp horizontal centerline (2),
to 191 mm (7.5 in) below (6) the lamp horizontal centerline
(2) on the aiming screen.
- Install the headlamp adjustment
screw plug.
Push to secure.
- Turn OFF the headlamps.
- Lower the hood.
Headlamp Aiming Visual Method
Horizontal and vertical
aiming of each of the composite headlamps is done by turning adjusting screws
which move the headlamp capsule in relation to the headlamp frame. The horizontal
adjustment screw (1) is located on the inboard side of each of the headlamp
assemblies, covered by a plug (2) on the headlamp bezel. The vertical
adjustment screw (3) is located on the inboard side of each of the
headlamp assemblies, below the lower edge of the headlamp bezel.
Some state and local authorities have specific requirements for aiming
the headlamps. These requirements must be followed.
Aiming Area Preparation
Choose an appropriate aiming area, then prepare the aiming screen as
described in the following.
• |
The aiming area should
be darkened and large enough to accommodate the vehicle and an additional
7.62 m (25 ft) measured from the face of the headlamp
capsules to the front of the screen. |
• | The floor on which the vehicle rests must be flat with the bottom
of the screen. If the floor is not level, compensate as necessary. |
• | The aiming screen should be at least 1.52 m (5 ft)
high by 3.66 m (12 ft) wide with a matte white surface well
shaded from extraneous light, and properly adjusted to the floor
on which the vehicle stands. The screen should be provided with a
vertical centerline (3), 2 laterally adjustable vertical tapes (2),
and 1 vertically adjustable horizontal tape (1). |
• |
Important: For each vehicle checked, the horizontal line or tape (1) on the screen
must be adjusted. Vehicles of the same model and year may have different standing
height for the headlamp capsules.
Make provisions to allow the screen to be movable, so that it can be
aligned parallel with the rear axle of the vehicle. This will allow for a
horizontal line drawn perpendicular to the centerline of the screen
to pass through the center point between the 2 headlamp capsules (4). |
• | After the aiming screen has been set up in a permanent location,
paint or tape a reference line on the floor 7.62 m (25 ft) from
the screen, to identify the proper location of the headlamp capsules
when they are being aimed (5). If a regular commercial aiming screen is not available, the screen may
consist of a vertical wall having a clear uninterrupted area at least 1.83 m
(6 ft) high by 3.66 m (12 ft) wide, finished
with a washable non-gloss white paint.
|
Vehicle Preparation
Prepare the vehicle for checking the headlamp beam aim as follows:
- Make sure that all the
components are in place on the vehicle, if other service has been performed
on the vehicle.
- The vehicle must have a full tank of gas.
- Make sure the tires are inflated to the proper pressures.
- Stop all other operations of work on the vehicle.
- Position the vehicle so it is square with the aiming screen, and
with the headlamp capsules directly over the reference line which has been
painted or taped on the floor.
- Locate the vertical center line on the aiming screen (3) so that
it is in line with the center of the vehicle (4). This can be accomplished
by sighting through the center of the rear window and over the hood.
Mark the vertical center of the front and rear windows with narrow tape.
Use these marks as sights to locate the centerline of the vehicle. Move the
vehicle or the screen until the center line of the screen comes into alignment
with the 2 points.
- Close the doors.
- Rock the vehicle sideways to stabilize the suspension.
- Measure the height from the floor to the horizontal center of
a headlamp capsule lens (6). Adjust the horizontal tape on the aiming screen
(1) to match this dimension.
- Measure the distance between the centerline of the right headlamp
capsule lens and the center of the left headlamp capsule lens (5). Position
the vertical tapes on the aiming screen (2) this distance to the right and
left of the screen centerline.
Adjustment Procedure
- Raise the hood.
- Raise the headlamps.
- Remove the headlamp adjustment screw plug from the headlamp bezel.
Reach under the headlamp bezel and push out the plug from behind.
Important: DO NOT cover the headlamp, this may cause excessive heat build up.
- Turn on the low beam headlamps and block the light from projecting onto
the screen from the passenger side headlamp.
- Inspect the horizontal aim.
- Adjust the aim using the horizontal adjusting screw, to align
the left edge of the high intensity zone with the headlamp vertical centerline (1),
within the range of 102 mm (4 in) to the left (4) of
the lamp vertical centerline (1), to 102 mm (4 in) to
the right (3) of the lamp vertical centerline (1) on the aiming screen.
- Inspect the vertical aim.
- Adjust the aim using the vertical adjusting screw, to align the
top edge of the high intensity zone to the headlamp horizontal centerline
(2), within the range of 51 mm (2 in) above (6) the lamp
horizontal centerline (2), to 64 mm (2.5 in) below (5)
the lamp horizontal centerline (2) on the aiming screen.
- Install the headlamp adjustment
screw plug.
Push to secure.
- Repeat the aiming procedure for the passenger side headlamp while
blocking the light from projecting onto the screen from the driver side headlamp.
- Turn OFF the headlamps.
- Close the hood.