2003 PONTIAC BONNEVILLE Owners Manual

Headlamp Horizontal Aiming
Turn the horizontal aiming screw (A) until the
indicator
(B) is lined up with zero.
B
A
Once the horizontal aim is adjusted, then adjust the
vertical aim.
Headlamp Vertical Aiming
Notice: Horizontal aiming must be performed
before making any adjustments to the vertical aim.
Adjusting the vertical aim first will result in an incorrect headlamp aim.
1. Find the aim dot on the lens of the low
beam lamps.
2. Measure the distance from the ground to the aim
dot on each lamp;
if left low beam, subtract two
inches. Record this distance.
3. At the wall or other flat surface, measure from the
ground upward the recorded distance from Step
2
and draw or tape a horizontal line the width of
the vehicle.
5-54

4. Turn on the low-beam 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.
Norice: DO noi cover a heariiarnp iu iii-lpi-uie 5386~
cut-off when aiming. Covering a headlamp may
cause excessive heat build-up which may cause
damage to the headlamp. 5.
Turn the vertical aiming
screw
(C) until the
headlamp beam is aimed to the
horizontal tape line.
The top edge of
the cut-off should be
positioned at the bottom edge of the
horizontal tape line.
6. Repeat Steps
4 and 5 for the opposite headlamp.
5-55

Bulb Replacement
For the type of bulb to use, see Replacement Bulbs on
page
5-60.
For any bulb changing procedure not listed in this
section, contact your dealer.
Halogen Bulbs
Headlamps
Halogen bulbs have pressurized gas inside
and can burst
if you drop or scratch the bulb.
You or others could be injured. Be sure
to read
and
follow the instructions on the bulb
package.
1. Reach behind the headlamp assembly, push in and
turn the bulb assembly counterclockwise to remove
the bulb assembly from the headlamp assembly.
5-56

Front Turn Signal and Parking
Lamps
2. Lift the tabs to remove the bulb from the assembly.
3. Replace the bulb. Push the bulb assembly in
and turn it clockwise to install the bulb assembly into
the headlamp assembly.
1. Remove the two bolts.
2. Use a larqe screwdriver by the outside mount to
separate the lamp assembly from the outboard
snap mounting pin. Slide the headlamp assembly
outward and lift
it out.
5-57

3. ~iSCOnneCt the wiring harness from the headlamp
assembly. 4.
5.
Tip the headlamp assembly and while pressing the
release, turn the bulb and socket counterclockwise
to remove them.
Replace the bulb and reinstall the socket. Then
reconnect the wiring harness to the lamp assembly.
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6. Slide the lamp assembly back into place by lining
up the track on the bottom
of the assembly with
the guide on the vehicle. Then connect the outboard
snap and secure the lamp assembly with the
two bolts.
C. Taillamp
D. PaiVBrake Lamp
1. Open the trunk. Turn the screws located inside of
the trunk counterclockwise and remove them.
2. Remove the plastic trim piece from the trunk.
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3. Pull the carpeting away from the rear corner
of the trunk.
4.
5.
6.
7.
A
Remove the three nuts holding the lamp in place
and remove the lamp assembly.
While pressing the release, turn the bulb socket
assembly counterclockwise to remove it from the
lamp assembly.
Pull the bulb straight out of the socket.
Replace the bulb and reverse Steps 1 through
6 to
reinstall the lamp assembly.
Replacement Bulbs
-
Exterior Lamp I Bulb Number
Front
I Headlamp I
-High Beam
~
9005
Low Beam 9006
Parkingnurn Lamps I 3157
Rear
Taillamps
Back-up Lamps 3057
3057
StoDlamDs 3057
Turn
I 3157
For any bulb not listed here contact Vour dealer.
5-60

Windshield Wiper Blade Replacement
Windshield wiper blades should be inspected at least
twice a year for wear or cracking. See
Part B:
Owner Checks and Services on page 6-18 for more
information.
For the proper windshield wiper blade replacement
length and type, see
Normal Maintenance Replacement
Parts on page
5- 101.
To replace the wiper blade assembly:
the vertically-locked position.
1. Lift the wiper up from the windshield and set into
2. Press the tab that holds the wiper blade to the arm.
3. Slide the blade down and off the arm.
4. Slide in the new blade and snap into place.
5-6 1