ignition BUICK CENTURY 1999 Repair Manual

yellowblue
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

yellowblue
6-61
Fuse Description
24 Stoplamps
26 Parking Lamps
27 Auxiliary Power Connection
(Power Drop)
-- Hot in ACC and Run
28 Crank Signal
-- Body Control Module,
Cluster, Powertrain Control Modules
29 Ignition Signal
-- HVAC Control Head
30 Brake Transmission Shift Interlock (BTSI)
31 Air Bag
32 Body Control Module
33 Hazard Flashers
34 Not UsedFuse Description
36 Ignition Signal
-- Hot in ACC and
Run
-- Body Control Module
38 Low Blower
39 Anti
-Lock Brakes
40 Turn Signals
41 Radio, HVAC Head, Remote Keyless
Entry, Cluster
42 High Blower
43 Not Used
44 Audio Steering Wheel Controls
45 Wipers

yellowblue
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

yellowblue
6-63
Relay Description
9 Cooling Fan 2
10 Cooling Fan 3
11 Starter Solenoid
12 Cooling Fan 1
13 Ignition Main
14 Not Used
15 A/C Clutch
16 Horn
17 Not Used
18 Not Used
19 Fuel Pump
20 Not Used
21 Generator
22 ECM
23 A/C Compressor Clutch
24 Cooling Fan
25 Electronic Ignition
26 TransaxleFuse Description
27 Horn
28 Fuel Injector
29 Oxygen Sensor
30 Engine Emissions
31 Not Used
32 Headlamp (Right)
33 Rear Compartment Release
34 Parking Lamps
35 Fuel Pump
36 Headlamp (Left)
37 Spare
38 Spare
39 Spare
40 Spare
41 Spare
42 Spare
43 Fuse Puller
SYMBOL A/C Compressor Clutch Diode

yellowblue
7-17
Ignition Transaxle Lock Check
While parked, and with the parking brake set, try to turn
the ignition key to LOCK in each shift lever position.

The key should turn to LOCK only when the shift
lever is in PARK (P).

The key should come out only in LOCK.
Parking Brake and Automatic Transaxle PARK (P)
Mechanism Check
CAUTION:
When you are doing this check, your vehicle
could begin to move. You or others could be
injured and property could be damaged. Make
sure there is room in front of your vehicle in case
it begins to roll. Be ready to apply the regular
brake at once should the vehicle begin to move.
Park on a fairly steep hill, with the vehicle facing
downhill. Keeping your foot on the regular brake, set the
parking brake.

To check the parking brake's holding ability: With
the engine running and transaxle in NEUTRAL (N),
slowly remove foot pressure from the regular brake
pedal. Do this until the vehicle is held by the parking
brake only.

To check the PARK (P) mechanism's holding ability:
With the engine running, shift to PARK (P). Then
release all brakes.
Underbody Flushing Service
At least every spring, use plain water to flush any
corrosive materials from the underbody. Take care to
clean thoroughly any areas where mud and other debris
can collect.

yellowblue
9-5
Flat Tire, Changing 5-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fluids and Lubricants 7-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Foreign Countries, Fuel 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
French Language Manual ii. . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Parking and Turn Signal Lamp Bulb
Replacement 6
-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Storage Armrest 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel 6-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Canadian 6-3, 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filling Your Tank 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gage 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In Foreign Countries 6-5 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuses and Circuit Breakers 6-59 . . . . . . . . . . . . . . . . . . . . . . .
Gages
Engine Coolant Temperature 2-56 . . . . . . . . . . . . . . . . . . . .
Fuel 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GAWR 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gear Positions, Automatic Transaxle 2-20 . . . . . . . . . . . . . . . .
Glove Box 2-44 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GM Mobility Program for Persons with Disabilities 8-5 . . . . .
Gross Axle Weight Rating (GAWR) 4-30 . . . . . . . . . . . . . . . .
Gross Vehicle Weight Rating (GVWR) 4-30 . . . . . . . . . . . . . .
Guide en Fran†ais ii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GVWR 4
-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Halogen Bulbs 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hazard Warning Flashers 5-2 . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Restraints 1-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Headlamps
Aiming 6
-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bulb Replacement 6-31 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flash-to-Pass 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High/Low Beam Changer 2-34 . . . . . . . . . . . . . . . . . . . . . .
On Reminder 2-39 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hearing Impaired, Customer Assistance 8-4 . . . . . . . . . . . . . .
Heating 3-4, 3-6, 3-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High-Beam Headlamps 2-34 . . . . . . . . . . . . . . . . . . . . . . . . . .
Highway Hypnosis 4-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hill and Mountain Roads 4-23 . . . . . . . . . . . . . . . . . . . . . . . . .
Hitches, Trailer 4-35 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hood
Checking Things Under 6
-8 . . . . . . . . . . . . . . . . . . . . . . . . .
Release 6-9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 2-32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydroplaning 4-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Positions 2-17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transaxle Lock Check 7-17 . . . . . . . . . . . . . . . . . . . .
Illuminated Entry 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inflation, Tire 6-41 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspections
Brake System 7
-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Cooling System 7-18 . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust System 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle Boot 7-18 . . . . . . . . . . . . . . . . . . . . . . . . .
Front Drive Axle Seal 7-18 . . . . . . . . . . . . . . . . . . . . . . . . .
Steering 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Suspension 7-18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle System 7-19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

yellowblue
9-6
Instrument Panel 2-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 6-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cluster 2-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block 6-59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel Brightness Control 2-40 . . . . . . . . . . . . . . . .
Interior Lamps 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jack, Tire 5-21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jump Starting 5-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Key Lock Cylinders Service 7-15 . . . . . . . . . . . . . . . . . . . . .
Key Reminder Warning 2-14 . . . . . . . . . . . . . . . . . . . . . . . . . .
Keys 2-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Labels
Certification 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Parts Identification 6-58 . . . . . . . . . . . . . . . . . . . . .
Tire-Loading Information 4-30 . . . . . . . . . . . . . . . . . . . . . .
Vehicle Identification Number 6-58 . . . . . . . . . . . . . . . . . . .
Lamps
Courtesy 2
-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dome 2-42 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reading, Rearview Mirror 2-42 . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle 2-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Leaving Your Vehicle with the Engine Running 2-27 . . . . . . .
Lighter 2-45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lights
Air Bag Readiness 1
-21, 2-51 . . . . . . . . . . . . . . . . . . . . . . .
Anti-Lock Brake System Warning 2-53, 4-7 . . . . . . . . . . . . Brake System Warning 2
-52 . . . . . . . . . . . . . . . . . . . . . . . . .
Change Oil Soon 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging System 2-52 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door/Trunk Ajar Warning 2-63 . . . . . . . . . . . . . . . . . . . . . .
Engine Coolant Temperature Light 2-55 . . . . . . . . . . . . . . .
Enhanced Traction System Active 2-54 . . . . . . . . . . . . . . . .
Enhanced Traction System Warning 2-53 . . . . . . . . . . . . . .
Interior 2-40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Coolant Warning 2-56, 6-23 . . . . . . . . . . . . . . . . . . . .
Low Fuel 2-64 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Oil Level 2-61, 6-11 . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Tire 2-57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Traction 2-55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Washer Fluid Warning 2-35, 2-63 . . . . . . . . . . . . . . . .
Oil Warning 2-60 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Belt Reminder 1-5, 2-51 . . . . . . . . . . . . . . . . . . . . . .
Security 2-62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Engine Soon 2-58 . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Vehicle Soon 2-63 . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Your Vehicle 4-30 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locks
Cylinders 7
-15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Delayed Locking 2-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Transaxle Lock Check 7-17 . . . . . . . . . . . . . . . . . .
Key Lock Cylinder Service 7-15 . . . . . . . . . . . . . . . . . . . . .
Lockout Protection Feature 2-7 . . . . . . . . . . . . . . . . . . . . . .
Manual Door 2-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Door 2-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Programmable Automatic Power Door 2-5 . . . . . . . . . . . . .