Description And Operation; Lighting System Description - GMC Chevrolet Camaro 1998 Service Manual

8-154 Lighting Systems
Description and Operation
Lighting System Description
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 u.ntil the bulb change is complete.
• Always wear eye protection when changing a
halogen bulb.
• Handle the bulb only by its base. A void
touching the glass.
• Do not drop or scratch the bulb.
• Keep dirt and moisture off the bulb.
• Place the used bulb in the new bulb's carton
atJd dispo$e of it properly.
• Keep halogen bulbs out of the reach pf children
Back-up Lamps
On Chevrolet vehicles, the back-up lamps are located
on the upper, innermost side of the taillamp. On
Pontiac vehicles, the back-up lamps are located on
the innermost side of the taillamp, next to the taillamp
filler. The back-up lamps will come on when the
trans.mission is placed i~to the REVERSE position. On
vehicles with automatic transmissions, the back-up
lamps are activated
by
the.
park/neutral position switch.
On vehicles with a manual transmission, the back-up
lamps are activated by the back-up lamp switch.
Daytime Running Lamps (DRL)
All vehicles are equipped with daytime running lamps
(DRL). The DRL system includes a solid state
module, and on Chevrolet vehicles only the system
includes an automatic control ambient light sensor.
Chevrolet and Canadian Chevrolet/Pontiac
The light sensor is located on the 1/P, inside of the
vent grille. The light sensor triggers the DRL module to
turn on the turn signal lamps when all of the following
conditions apply:
• The vehicle has been started.
• The vehicle is in daylight.
• The headlamp switch is in the OFF position.
Turning the headlamps on manually overrides the
DRL system. The following lights are not on when the
DRL are on:
• The 1/P lights
• The taillamps
The car light sensor triggers the module to turn the
headlamps ON under the following conditions:
• At dusk
• If the car is started in the darkness
Body and Accessories
The light sensor will perform the following actions after
sunrise, or when the vehicle is in a bright enough area:
• Turn OFF the headlamps
• Turn ON the turn signal lamps
Pontiac
The DRL system turns the turn signal lamps ON when
the vehicle is started. The turn signal lamps will
stay on until the headlamps are turned on manually in
order to override the system.
Front Fog Lamps
On Chevrolet vehicles equipped with fog lamps, the
fog lamp switch is located above the radio and to the
right of the steering wheel. On Pontiac vehicles,
the fog lamp switch is located below the headlamp
and instrument panel dimmer switch, to the left of the
steering column. Perform the following steps in
order to use the fog lamps:
1. Turn on the headlamps or the parking lamps.
2. Push the right side of the fog lamp switch in order
to turn on the fog lamps.
3. Push the left side of the fog lamp switch in order
to turn off the fog lamps.
Do not use the fog lamps as a substitute for the
headlamps.
Switching to the high-beam headlamps will turn the
fog lamps off. Switching back to low-beam headlamps
will turn the fog lamps on again.
Aim the fog lamps for proper illumination of the road.
Inspect the fog lamp aim after the following
situations:
• When a new bulb is installed
• If service repairs to the front end area may have
disturbed the fog lamp mounting
Front Sidemarker Lamps
On Chevrolet vehicles, the front sidemarker lamps are
part of the park and turn signal lamp. On Pontiac
vehicles, the front side marker lamp on the outer sides
of the front fascia. The front sidemarker lamps will
come on when either of the following lamps are on:
• The headlamps
• The parking lamps
The front sidemarker lamps also have reflectors that
will shine when light strikes the reflectors. The
reflectors will shine whether or not the vehicle lamps
are on.
The appropriate front sidemarker lamps will flash in
unison with the front turn signal lamp on the same side
when one of the following situations occurs:
• The headlamps are off when a turn is signaled.
• The parking lamps are off when a turn is signaled.
The front sidemarker lamp and the front turn signal
lamp will flash alternately when one of the following
situations exists:
• The headlamps are on and a turn is signaled.
• The parking lamps are on and a turn is signaled.
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