Dodge ram truck 3500 1996 Service Manual page 496

8L - § LAMPS
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S E R V I C E
PROCEDURES (Continued)
(3) Up 1.27 meters (5 feet) from the floor, tape a
line on the wall at the centerline of the vehicle. Sight
along the centerline of the vehicle (from rear of vehi­
cle forward) to verify accuracy of the line placement.
(4) Rock vehicle side-to-side three times to allow
suspension to stabilize.
(5) Jounce front suspension three times by pushing
downward on front bumper and releasing.
(6) Measure the distance from the center of head­
lamp lens to the floor. Transfer measurement to the
alignment screen (with tape). Use this line for
up/down adjustment reference.
(7) Measure distance from the centerline of the vehicle
to the center of each headlamp being aligned. Transfer
measurements to screen (with tape) to each side of vehicle
centerline. Use these lines for left/right adjustment refer­
ence.
HEADLAMP ADJUSTMENT
A properly aimed low beam headlamp will project top
edge of high intensity pattern on screen from 50 mm (2 in.)
above to 50 mm (2 in.) below headlamp centerline. The
side-to-side outboard edge of high intensity pattern should
be from 50 mm (2 in.) left to 50 mm (2 in.) right of head­
lamp centerline (Fig. 1). The preferred headlamp align­
ment is 1" down for the up/down adjustment and §
CENTER OF
VEHICLE TO
CENTER O F
F O G LAMP
LENS
LEFT AND RIGHT
ADJUSTMENT SCREW
UP AND DOWN
ADJUSTMENT SCREW
Fig. 2 Aero Headlamp Alignment
J958L-23
for the left/right adjustment. The high beam pattern
should be correct when the low beams are aligned properly.
To adjust headlamp aim, rotate alignment screws (Fig. 2)
to achieve the specified high intensity pattern.
FOG LAMP ALIGNMENT
Prepare an alignment screen. Refer to Alignment
Screen Preparation paragraph in this section. A prop­
erly aligned fog lamp will project a pattern on the
alignment screen 100 mm (4 in.) below the fog lamp
centerline and straight ahead (Fig. 3).
HIGH-INTENSITY
AREA
FLOOR T O
CENTER O F
F O G LAMP
LENS
VEHICLE
CENTERLINE
FRONT O F
F O G LAMP
938L-26
Fig. 3 Fog Lamp Alignment —Typical