Halogen Bulbs
Caution: Halogen bulbs contain gas under pressure. Handling a bulb improperly
could cause it to shatter into flying glass fragments. To help avoid personal
injury:
| • | Turn off the lamp switch and allow the bulb to cool before changing
the bulb. |
| • | Leave the lamp switch OFF until the bulb change is complete. |
| • | Always wear eye protection when changing a halogen bulb. |
| • | Handle the bulb only by its base. Avoid touching the glass. |
| • | Keep dirt and moisture off the bulb. |
| • | Properly dispose of the used bulb. |
| • | Keep halogen bulbs out of the reach of children. |
Exterior Lighting
The exterior lighting system includes the following components:
| • | Front park/turn signal/sidemarker lamps |
| • | Rear tail/stop/turn signal lamps |
| • | High-mounted stop lamp (HMSL) |
This system also includes all controls and related hardware required
for proper operation of these lamps.
Headlamps
| • | The headlamp switch on the instrument panel controls the headlamps.
Turn the headlamp switch in order to light both of the headlamps and parking
lamps. When the headlamp switch is turned, the following lamps will be
lit: |
| • | The turn signal/headlamp dimmer switch lever on the steering column
controls the high-beam headlamp operation. In order to change the headlamp
operation from low beam to high beam (or high beam to low beam), pull the
turn signal/headlamp dimmer switch lever to the full back position (until
the detent is felt) and release. The high-beam indicator (blue) in the
instrument cluster will light during the high-beam headlamp operation. |
| • | The turn signal/headlamp dimmer switch lever can be used to flash-to-pass.
In order to flash-to-pass, pull the turn signal/headlamp dimmer switch lever
back until both the low-beam and the high-beam headlamps are lit. Do not
pull the lever past the detent. The low-beam headlamp operation will resume
when you release the turn signal/headlamp dimmer switch lever to the original
position. |
Daytime Running Lamps (DRL)
| • | The daytime running lamp (DRL) system consists of the following
components which are integral to the DRL module: |
| • | The DRL system is designed to automatically operate certain exterior
lamps, depending on outside light conditions, whenever the ignition switch
is in the RUN position. |
| • | The DRL system operates in both a DAY or a NIGHT mode. In the
DAY mode, the turn signal lamps are lit at full brilliance. If the system
is in the DAY mode and the turn signal switch is on, the turn signal lamps
will flash normally. |
| | In the NIGHT mode, the headlamps, the front park/turn signal/sidemarker
lamps, and the tail lamps are lit at full brilliance. |
| • | The signal from the DRL sensor determines the DAY and the NIGHT
modes. The DRL sensor is a photodiode element, which is a send conductor that
reacts to changes in light intensity. The DRL module monitors the signal
from the DRL sensor and determines whether the system should operate in
the DAY or the NIGHT mode. |
| • | When the DRL module is in the DAY mode, the DRL relays are pulled
closed and the voltage is applied through the module to the turn signal lamps.
When the turn signal switch is on in day mode, the corresponding DRL relay
will open and voltage will be applied to the turn signal lamp by the flasher.
At nightfall, as light intensity decreases, the DRL sensor signal changes.
In response to this change, the DRL module will change from DAY to NIGHT
mode as a switching point is crossed. |
| • | When NIGHT mode is initiated, the DRL relays are opened and the
headlamp and parklamp relays are pulled closed. The headlamps, the parking
lamps, and the tail lamps receive full system voltage and operate at full
brilliance under these conditions. |
| • | If the parking brake is applied before the ignition switch is
turned from OFF to RUN, the DRL operation is canceled. As long as the brake
is engaged, this function allows the driver to start the engine and keep
the headlamps or turn signal lamps OFF. The DRL system operation resumes
as soon as the parking brake is released. This deactivation feature only
functions when the parking brake is applied before the ignition switch
is turned to RUN. If the parking brake is applied after the ignition switch
is turned to RUN, the DRL system operation will not be affected. |
Fog Lamps
| • | The fog lamps are mounted in the front bumper fascia on the Pontiac
and the Oldsmobile vehicles. |
| • | The fog lamps will light whenever the following conditions are
met: |
| - | The fog lamp switch is in the ON position. |
| - | The headlamp or the parking lamp is ON. |
Front Park/Turn Signal/Sidemarker Lamps
| • | The front park/turn signal/sidemarker lamps are located in a separate
capsule next to the headlamp. Turn the parking lamp or the headlamp switch
at any time in order to operate the front park/turn signal/sidemarker lamps. |
| • | When a turn is signaled, the appropriate turn signal lamp flashes
in order to signal a turn. The turn signals operate only with the ignition
switch in RUN. The turn signals will not operate during hazard flasher
operation. |
Tail Lamps
| • | The rear tail lamp includes the following components: |
| • | The tail lamps are lit when the parking lamps or the headlamps
are in operation. |
| • | Indicate a turn with the turn signal/headlamp dimmer switch in
order to flash the rear turn signal lamps with the front turn signal lamps. |
| • | Depress the brake pedal and close the stop lamp switch in order
to light the stop lamps. The stop lamps also light when the hazard lights
are in operation. |
Backup Lamps
| • | The backup lamps are part of the tail lamp. |
| • | Turn the ignition switch to the RUN position or move the transaxle
to reverse in order to light the backup lamps. |
High-Mounted Stop Lamp (HMSL)
| • | The high-mounted stop lamps (HMSL) is in the top of the liftgate. |
| • | Depress the brake pedal and close the stop lamp switch in order
to light the HMSL lights. |
License Lamps
| • | The license lamps are located under the liftgate molding handle
for the liftgate latch. |
| • | Turn the park lamp or the headlamp switch to the ON position in
order to light the license lamps. |
The underhood lamp lights whenever the hood is opened.
Interior Lighting
Interior Lamp Override Switch
| • | The interior lamp override switch is located in the overhead console
switchbank. Press the symbol on the bottom of the rocker switch in order to
override the control of the interior lamps. The power will shut off from
the following lamps: |
| - | Instrument panel courtesy lamp |
| - | Instrument panel compartment lamp |
| • | Press the top of the interior lamp override switch in order to
turn the power to these lamps back on. This will allow the lamps to stay on
when any door is opened. |
The instrument panel courtesy lamps light whenever a door is opened
and the interior lamp override switch is closed.
The instrument panel compartment lamp lights whenever the instrument
panel compartment door is opened.
Dome Lamp
| • | Open one of the doors or close the interior lighting switch in
order to light the center mounted dome lamp. |
| • | Place the interior lamp override switch in the OFF position in
order to cancel the dome lamp operation. |
Lighted Visor Mirror
| • | The lighted visor mirror, if equipped, is located next to the
vanity visor mirror. |
| • | Raise the lighted visor mirror cover in order to light the mirror. |
Overhead Console Reading Lamps
| • | The front overhead console includes the following components: |
| • | Press the reading lamp lens in order to turn the reading lamp
on or off. |
There are 2 side rail reading lamps in the third row headliner, above
the outboard seating positions. If your vehicle does not have dual sliding
doors, there is also a reading lamp in the second row on the left side.
Cargo Lamp
| • | The cargo lamp is located in the rear of the vehicle, above the
liftgate opening. |
| • | The cargo lamp does not have a switch. Open the doors and the
liftgate in order to light the cargo lamp. You may also enable the interior
lamp override switch. |
Exterior and Interior Lighting
Most lighting problems are caused by the following items:
Many of these problems are repaired by replacing a part that requires
a special procedure, such as a lens and housing sealed together. For these
repairs, follow the instructions normally included in the replacement parts
package.
When removing a component that requires special sealing items, such
as sealing washers, be sure to reinstall those items when replacing the component.
If any body sealing items, such as grommets, are disturbed, be sure to repair
them so that the passenger compartment remains properly sealed.
Use the following general guidelines in order to diagnose a lighting
system problem:
| • | Verify the owner's complaint. |
| • | Attempt to operate the other systems that are powered through
the same fuse. |
| | If the other systems powered through the same fuse are inoperative,
replace the fuse. Refer to Electrical Diagnosis for fuse applications. |
| • | Check for aftermarket (non-OEM) equipment. |
| | If add-on accessories are discovered, disconnect the system in order
to make certain that the add-on is not the cause of the problem. |
| • | Check all connectors and related wiring to the suspect electrical
component: |
| - | Poor mating of connector halves |
| - | Terminals not fully seated in the connector body (backed out) |
| - | Dirt or corrosion on the connector terminals. |
| - | The terminals must be clean and free of any foreign material which could
interfere with proper terminal contact. |
| • | Check related ground eyelets for a clean and tight connection. |
If the above general guidelines fail to achieve a satisfactory conclusion,
refer to
How to Use Electrical Diagnosis
in Wiring Systems for further electrical wiring and diagnostic information.
