1999 BUICK CENTURY sunroof

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2-42 Rearview Mirror Reading Lamps
Use the switch next to each lamp to turn them on and off.
Dome Lamp (If Equipped)
The dome lamp will come on when you open the doors.
Battery Rundown Protection
Your vehicle has a feature to help prevent you from
draining the battery in case you accidentally leave the
interior courtesy lamps, reading/map lamps, visor vanity
lamps, trunk lamp, underhood lamp or glove box lamps
on. If you leave any of these lamps on, they will
automatically turn off after 20 minutes, if the ignition is
in OFF. The lamps won't come back on again until you:

turn the ignition on,

turn the lamp switch off, then on, or

open a door.
Note that if your vehicle has less than 15 miles (25 km)
on the odometer, the battery saver will turn off the lamps
after only three minutes.
Retained Accessory Power (If Equipped)
With retained accessory power, your power windows,
audio system and sunroof will continue to work up to
10 minutes after the ignition key is turned to OFF and
before any of the doors are opened.
Mirrors
Adjust all the mirrors so you can see clearly when you
are sitting in a comfortable driving position.

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2-47
See ªRetained Accessory Powerº in the Index. The
control switch is located overhead on the headliner.
To open the astroroof, push the rear (indented part)
of the switch once and the astroroof will open to the
vent position only. You will need to open the sunshade
by hand.
Push the rear of the switch a second time and the
astroroof and sunshade will will open by themselves.
This is the express
-open feature.To close the astroroof, push and hold the front of the
switch until the sunroof motor stops. The sunshade can
only be closed by hand.
OnStar (Option)
Your vehicle's electrical wiring will accommodate
dealer installation of OnStar. The following services are
available 24 hours a day:

Emergency Services Button

Roadside Service with Location

Automatic Notification of Air Bag Deployment

Stolen
-Vehicle Tracking

Remote Door Unlock

Hands
-Free, Voice Activated Cellular Telephone

Concierge/Customer Conveniences Services

Remote Diagnostics

And much more.
For more information, contact your dealer.

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6-60
Circuit
BreakerDescription
A Tire Inflation Monitor Reset Button
B Power Windows/Sunroof
C Rear Defog
D Power SeatsFuse Description
1 Not Used
4 Ignition Signal
-- Hot in Run and
Start
-- PCM, BCM U/H Relay
5 Remote Radio Premium Sound
6 Power Mirrors
8 Panel Dimming
10 Ignition Signal
-- Hot in Run, Unlock and
Start
-- Cluster, Powertrain Control
Module, Body Control Module
13 DRL Module
14 Interior Lamps
15 Door Locks
17 Taillamps, License Lamp
18 Radio
19 Heated Mirror
20 Cruise Control
22 Clusters
23 Cigarette Lighter
-- Auxiliary Power
Connection (Power Drop), Data Link

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6-62
Underhood Electrical Center -- Passenger's Side
Some fuses and relays are located in the underhood
electrical center on the passenger's side of the
engine compartment.Fuse Description
1 ABS
2 Starter Solenoid
3 Power Seats, Rear Defog
4 High Blower, Hazard Flasher,
Stoplamps, Power Mirror, Door Locks
5 Ignition Switch, BTSI, Stoplamps,
ABS, Turn Signals, Cluster, Air Bag,
DRL Module
6 Cooling Fan
7 Interior Lamps, Retained Accessory
Power, Keyless Entry, Data Link, HVAC
Head, Cluster, Radio, AUX Power
(Power Drop), Cigarette Lighter
8 Ignition Switch, Wipers, Radio, Steering
Wheel Controls, Body Control Module,
AUX Power (Power Drop), Power
Windows, Sunroof, HVAC Controls,
DRL, Rear Defog Relay