1999 Oldsmobile Silhouette headlamp

yellowblue
6-33
8. Carefully put the bulb assembly back into the lamp
housing and tighten the black retainer ring in place.
Be careful not to damage the bulb on the headlamp
aiming bar.9. Align the pins on the bottom of the headlamp
assembly with the holes in the lamp support bracket
while placing the holes in the assembly over the
bolts where the wing nuts attach.
10. Replace and tighten the wing nuts.
11. Replace the parking/turn signal lamp assembly by
lining up the tabs at the back of the assembly with
the holes in the fender.
12. Tighten the bolt connecting the parking/turn signal
lamp assembly. Be sure the tab from the
parking/turn signal lamp assembly is inboard of the
tab from the headlamp assembly.

yellowblue
6-34 Front Turn Signal/Parking Lamps
1. Open the hood.
2. Remove the thumb screw attaching the parking/turn
signal lamp assembly to the headlamp assembly.
3. Pull the parking/turn signal lamp assembly away
from the vehicle.
4. Unscrew the bulb socket from the lamp assembly by
pressing the tab while turning it counterclockwise.
5. Replace the bulb by pulling the old one out and
gently pushing the new one into the lamp socket.
6. Line up the tabs on the sockets with the gaps in the
socket holes and screw the bulb socket back into the
lamp housing until a click is heard (the tab popping
back out).

yellowblue
6-35
7. To replace the lamp assembly, line up and insert the
tabs on the back of the assembly with the slots in the
fender. Engage the lower clip on the front of the
lamp assembly, keeping the upper tab on the
parking/turn signal lamp assembly inboard of the
headlamp bracket tab.
8. To align the parking/turn signal lamp assembly with
the headlamp assembly, lift up the parking/turn
signal lamp assembly until the upper edge is
contacting the fender.
9. Fasten the parking/turn signal lamp assembly to the
headlamp assembly with the thumb screw removed
in Step 2.
Front Sidemarker
1. Open the hood.
2. Remove the thumb screw attaching the parking/turn
signal lamp assembly to the headlamp assembly.
3. Pull the parking/turn signal lamp assembly away
from the vehicle.
4. Unscrew the bulb socket from the lamp assembly by
turning it counterclockwise.

yellowblue
6-36
5. Replace the bulb by pulling the old one out and
gently pushing the new one into the lamp socket.
6. Line up the tabs on the sockets with the gaps in the
socket holes and screw the bulb socket back into the
lamp housing.7. To replace the lamp assembly, line up and insert the
tabs on the back of the assembly with the slots in the
fender. Engage the lower clip on the front of the
lamp assembly, keeping the upper tab on the
parking/turn signal lamp assembly inboard of the
headlamp bracket tab.
8. To align the parking/turn signal lamp assembly with
the headlamp assembly, lift up the parking/turn
signal lamp assembly until the upper edge is
contacting the fender.
9. Fasten the park/turn signal lamp assembly to the
headlamp assembly with the thumb screw removed
in Step 2.

yellowblue
6-45 Wheel Alignment and Tire Balance
The wheels on your vehicle were aligned and balanced
carefully at the factory to give you the longest tire life
and best overall performance.
Scheduled wheel alignment and wheel balancing are not
needed. However, if you notice unusual tire wear or
your vehicle pulling one way or the other, the alignment
may need to be reset. If you notice your vehicle
vibrating when driving on a smooth road, your wheels
may need to be rebalanced.
Wheel Replacement
Replace any wheel that is bent, cracked, or badly rusted
or corroded. If wheel nuts keep coming loose, the wheel,
wheel bolts and wheel nuts should be replaced. If the
wheel leaks air, replace it (except some aluminum
wheels, which can sometimes be repaired). See your
dealer if any of these conditions exist.
Your dealer will know the kind of wheel you need.
Each new wheel should have the same load
-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel bolts
or wheel nuts on your vehicle can be dangerous.
It could affect the braking and handling of your
vehicle, make your tires lose air and make you
lose control. You could have a collision in which
you or others could be injured. Always use the
correct wheel, wheel bolts and wheel nuts
for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.

yellowblue
6-56
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle
unless you check with your dealer first. Some
electrical equipment can damage your vehicle
and the damage wouldn't be covered by your
warranty. Some add
-on electrical equipment can
keep other components from working as
they should.
Your vehicle has an air bag system. Before attempting to
add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring is protected by an internal circuit
breaker in the instrument panel fuse panel. An electrical
overload will cause the lamps to go on and off, or in
some cases to remain off. If this happens, have your
headlamp wiring checked right away.
Windshield Wipers
The windshield wiper motor is protected by an internal
circuit breaker and a fuse. If the motor overheats due to
heavy snow, etc., the wiper will stop until the motor
cools. If the overload is caused by some electrical
problem, be sure to get it fixed.
Power Windows and Other Power Options
Circuit breakers in the instrument panel fuse panel
protect the power windows and other power accessories.
When the current load is too heavy, the circuit breaker
opens and closes, protecting the circuit until the problem
is fixed.

yellowblue
6-58
Circuit
BreakersUsage
HEADLAMP DRL Control Module, Headlamp and
Instrument Panel Dimmer Switch
PWR WDO Front Power Windows
PWR SEAT/PSD 6
-Way Power Seat(s) and Rear
Side Door Actuator Motor
FRT HVAC/HI
BLWRBlower Motor Hi Speed
Relay ModuleFuses Usage
SWC
BACKLIGHTSteering Wheel Radio Control
Switches (Illumination)
ELEC PRNDL Instrument Cluster to
PRNDL Indicators
PWR MIRROR Power Remote Control
Mirror Switch
CRUISE Cruise Control Module, Switch
and Release Switch
PWR QTR
VENTInterior Lamps and Multifunction
Switch (Power Vent Switch)
FRT
WPR/WSHRWindshield Wiper/Washer Motor
and Switch
PASS KEY PASS
-Key III System
PWR LOCK Body Control Module (BCM)
HTD MIRROR Heated Mirrors
RH T/LP Not Used
RR FOG LP Not Used
CIGAR/DLC Cigarette Lighter and Data Link
Connector (DLC)
T/SIG Turn Signal Switch
RR HVAC Rear Blower Motor, Rear
Heater
-A/C Control, Temperature
Door Actuator (Rear)

yellowblue
6-61
Maxi Fuse Usage
1
-COOL FAN 2 Coolant Fans
3
-HEADLAMPS Circuit Breakers: FRT HVAC HI
BLWR, and HEADLAMP Fuses
(Instrument Panel): HAZARD
and STOPLAMP
4
-BATT MAIN 2 Circuit Breaker: PWR
SEAT/PSD. Fuses (Instrument
Panel): ELC and RR DEFOGMaxi Fuse Usage
5
-IGN MAIN 1 Ignition Switch to Fuses
(Instrument Panel): ABS/TCS
IGN, CRUISE, DRL, ELEC
PRNDL, IGN 1, PSD, SIR, T/SIG
and PCM [IGN MAIN Relay
(Underhood Electrical Center
Fuses: A/C CLU, ELEK IGN,
IGN 1
-U/H, INJ, TCC)]
6
-COOL FAN 1 Coolant Fans
7
-BATT MAIN 1 Fuses (Instrument Panel): ABS
MOD BATT, CIGAR/DLC,
CTSY LAMP, FRT PWR SCKT,
PWR LOCK, PWR MIRROR and
RR PWR SCKT
8
-IGN MAIN 2 Ignition Switch to Fuses (I/P):
BCM PRGRM, FRT HVAC
LOW/MED BLWR, FRT
WPR/WSHR, HVAC/DRL,
MALL/RADIO/DIC, PWR QRT
VENT, RR HVAC, RR
WPR/WSHR, SWC ACCY and
PWR WDO Circuit Breaker