All Wiring Diagrams for Buick Century 2003 model

AIR CONDITIONING

Compressor Wiring Diagram for Buick Century 2003

List of elements for Compressor Wiring Diagram for Buick Century 2003:

• (i/p harn, 18 cm from radio breakout)
• (i/p harn, right side of steering column, 19 cm from radio breakout)
• (lower left front of engine) g113
• (w/ auto a/c)
• (w/ manual a/c)
• 5 volt ref
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c compressor clutch
• A/c press signal
• A/c refrigerent pressure sensor (left front strut tower, on a/c liquid line)
• A/c request
• Auto a/c
• Battery
• C11
• C12
• Class 2 ser data
• Clutch request
• Clutch rly ctrl
• D12
• Engine controls system
• G200 (behind right side of dash)
• Ground
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ign main relay (closed in run or start)
• Ignition
• Low ref
• Manual a/c
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• Rdo, hvac, rfa clstr, cel tel fuse 10a
• S105 (engine harn, front of engine compt, 4 cm from c105 breakout)
• S167 (engine harn, 4 cm from pcm breakout)
• S202
• S230
• S233 (i/p harn, behind center of dash, 4 cm from radio breakout)
• Serial data
• Sp205 (behind data link connector)
• Underhood fuse block (right side of engine compt)

Manual A/C Wiring Diagram for Buick Century 2003

List of elements for Manual A/C Wiring Diagram for Buick Century 2003:

• (behind right side of dash) g200
• (cool fan jumper harn, 19 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 19.5 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 20 cm from left conn to cooling fan motor)
• (engine harn, front of engine compt, 4 cm from c105 breakout)
• (engine harn, left side of engine compt, 4 cm from pcm breakout)
• (fuel inj jumper harn, midway between fuel inj no 3 breakout & map sensor breakout)
• (i/p harn, 18 cm from radio breakout)
• (i/p harn, behind center of dash, 4 cm from radio breakout)
• (left side of hvac module) left air temperature actuator
• (top left side of engine, below throttle body)
• +5v reference
• 3.1l
• 3.8l
• A/c compressor clutch
• A/c clu diode
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• A/c press signal
• A/c refrigerent pressure sensor (at left front strut tower, on a/c liquid line)
• A/c request sig
• A10
• A11
• Battery
• Blower motor (behind right side of dash, in hvac module)
• Blower motor resistor assembly (under right side of dash, right side of hvac module)
• C11
• Clutch request
• Comp control
• Cool fan 1 fuse 15a
• Cool fan 2 fuse 15a
• Cool fan 1 relay
• Cool fan 2 relay
• Cool fan 3 relay
• Defogger on
• Defogger system
• Drvr temp ctrl
• E10
• Ect ground
• Ect signal
• Engine controls system
• Engine coolant temperature (ect) sensor
• F12
• Fan off input
• G113 (lower
• G200 (behind right side of dash)
• Gnd
• Ground
• High blower fuse 30a
• High blower relay
• High speed
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block (behind right side of dash)
• Ign
• Ign main relay (closed in run or start)
• Ignition
• Interior lights
• Interior lights system
• Lamp dim sig
• Left cooling fan
• Left cooling fan diode (3.1l)
• Left front of engine)
• Low blower fuse 20a
• Low reference
• Low speed
• Nca
• Nca nca
• Off
• Pass temp ctrl
• Pos
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Rdo, hvac, rfa clstr, cel tel fuse 10a
• Right air temperature actuator (right side of hvac module)
• Right cooling fan
• Right cooling fan diode (3.1l)
• S101
• S102
• S103
• S104
• S105
• S121
• S167
• S230
• S233
• Tan
• Underhood fuse block (right side of engine compt, mounted to strut tower)

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram for Buick Century 2003

List of elements for Anti-lock Brakes Wiring Diagram for Buick Century 2003:

• A10
• A11
• Abs fuse 1 60a
• Abs fuse 10a
• Anti-lock fail ind
• B10
• B11
• B12
• Battery
• Body control module (bcm) (behind left side of dash) left of steering column)
• Brake fluid level switch (in brake fluid reservoir)
• Brake ind
• Brake pressure modulator valve
• C10
• C11
• Cluster fuse 10a
• Data link connector (dlc) (under left side of dash, right of steering column)
• Delivered torque
• Desired torque
• Electronic brake control module (ebcm) (at left side of engine compt, near strut tower)
• Electronic power steering system
• G113 (lower left front eng, on transaxle stud left of starter)
• G203 (below dash, right side of steering column)
• Ground
• Hot at all times
• Hot in run or start
• Hot in run, bulb test or start
• I/p fuse block (behind right side of dash, in right door opening)
• Ignition
• Instrument panel cluster
• Interior lights system
• Left front wheel spd (hi)
• Left front wheel spd (lo)
• Left front wheel speed sensor
• Left rear wheel spd (hi)
• Left rear wheel spd (lo)
• Left rear wheel speed sensor
• Low trac ind
• Nca
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner asemmbly)
• Pump motor
• Red
• Regal
• Right front wheel spd (hi)
• Right front wheel spd (lo)
• Right front wheel speed sensor
• Right rear wheel spd (hi)
• Right rear wheel spd (lo)
• Right rear wheel speed sensor
• S205 (i/p harn, below dash, near c201, 14 cm from g201 breakout)
• S211
• Serial data signal
• Splice pack sp205 (behind data link connector)
• Stop lamp sw out
• Stop lamp switch (on brake pedal support bracket)
• Stop lamps fuse 15a
• Strng var assist motor
• Tan
• Trac off ind
• Traction control switch
• Underhood fuse block (mounted to right strut tower)
• Vent tube

ANTI-THEFT

Anti-theft Wiring Diagram for Buick Century 2003

List of elements for Anti-theft Wiring Diagram for Buick Century 2003:

• B10
• B12
• Batt
• Bcm gnd
• Bcm pwr fuse 10a
• Body control module (behind left side of dash, left of steering column)
• Cluster fuse 10a
• Crank fuse 2 40a
• Crank relay ii
• Crank signal bcm, cluster fuse 10a
• Crank voltage
• Data link connector (dlc) (under left side of dash, right of steering column)
• F10
• G203 (below dash, right side of steering column)
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• Hot in run, bulb test or start
• Hot in start
• Ign
• Ign 0
• Ign 0: cluster pcm & bcm fuse 10a
• Ign key sig
• Ign ref lo
• Ignition switch
• Instrument panel cluster
• Ip fuse block
• K10
• K11
• Key
• Key in
• Key in sig
• Key out
• M10
• M11
• Pass-key enable switch
• Pcm bcm ign relay fuse 10a
• Pnk
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• Resistor pellet
• S211
• S270
• Security indicator
• Serial data
• Splice pack sp205 (behind data link connector)
• Starter rly ctrl
• Starter solenoid
• Tan
• Underhood fuse block (mounted to right strut tower)

BODY CONTROL MODULES

Body Control Modules Wiring Diagram for Buick Century 2003

List of elements for Body Control Modules Wiring Diagram for Buick Century 2003:

• (2 door)
• (regal)
• A/t shift lock sol sup volt
• A10
• A11
• A12
• Anti-lock brakes system
• Anti-theft system
• B10
• B11
• B12
• Bcm acc fuse 10a
• Bcm power fuse 10a
• Body control module (bcm) (behind left side of dash, left of steering column)
• Computer data lines system
• Courtesy lamp low ctrl
• Courtesy lamp sw out
• Crank, signal, bcm, cluster fuse 10a
• Door lock switch, driver
• Door lock switch, front passenger
• Door locks fuse 20a
• Driver door ajar sw sig
• Driver seat belt sw input
• Drl mod output-park brake
• Drl photocell ret
• Drl photocell sig
• Exterior lights system
• Fog lamp sw out
• Fuse block, underhood
• Fuse output-acc/run/crank
• Fuse output-accessory
• Fuse output-bat
• Fuse output-crank
• Fuse output-ignition 1
• G201 (below dash, left of steering column)
• G203 (below dash, right of steering column)
• G301 (inside left door sill, forward of left front seat)
• Grd
• Headlamp sw output
• Headlamp sw sig
• Headlights system
• Horn relay output
• Horns system
• Hot at all times
• Hot in acc or run
• Hot in off, run or start
• Hot in run or start
• I/p block block
• I/p fuse block
• Ign 0, cluster, pcm & bcm fuse 10a
• Ignition key alarm switch
• Ignition key resistor lo ref
• Ignition key resistor sig
• Inadv power bus fuse 15a
• Interior lights system
• Key reminder sw sig
• Lf turn sig lamp feed
• Lf turn sig sw output
• Lock
• Low tire press reset sw sig
• Nca
• Park brake switch (on parking brake assembly)
• Park lamp sw sig-off
• Park lamp sw sig-on
• Pcm, bcm u/h relay fuse 10a
• Pnk
• Power distribution system
• Power distribution system (rap)
• Pwr dr lk mtr feed
• Pwr dr lock sw out
• Pwr dr lock sw output
• Rap relay ctrl
• Remote keyless entry circuit
• Rf turn sig lamp feed
• Rf turn sig sw output
• Right ft door open sw sig
• S211
• S234
• S269
• S270
• S283
• S303
• S330
• S504
• S604
• Seat belt switch (part of driver's seat belt asembly)
• Serial data sig
• Serial data signal class 2
• Shift interlock system
• Tan
• Tire reset switch
• Traction ctrl sig sw
• Trunk ajar sw sig
• Trunk lid release sw sig
• Trunk release rly feed
• Trunk, tailgate, fuel doors system
• Unlock

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Buick Century 2003

List of elements for Computer Data Lines Wiring Diagram for Buick Century 2003:

• Body control module (bcm) (behind left side of dash, left of steering column)
• D12
• Data clss 2
• Data link connector (dlc) (under left side of dash, right of steering column)
• E & c ser data
• E & c ser data c2
• E1 e & c ser data
• Electronic brake control module (ebcm) (at left side of engine compt, near strut tower)
• G200 (behind right side of glove box)
• G203 (below dash, right side of steering column)
• Hot at all times
• Hvac control module
• I/p fuse block (behind right side of dash, in right door opening)
• Inflatable restraint sensing & diagnostic module (sdm) (below carpet, under right front seat)
• Instrument panel cluster
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Radio
• Radio, hvac, rfa, cluster, data link fuse 15a
• S202
• S211
• S230
• Splice pack sp205 (behind data link connector)
• Vehicle communications interface module (on rear of left rear wheelhouse)

COOLING FAN

Cooling Fan Wiring Diagram for Buick Century 2003

List of elements for Cooling Fan Wiring Diagram for Buick Century 2003:

• (cool fan jumper harn, 19 cm from right conn to cooling fan motor)
• (cooling fan jumper harn, 19.5 cm from right conn to cooling fan motor) s104
• (cooling fan jumper harn, 20cm from left conn to cooling fan motor)
• (engine harn, front of engine compt, 4 cm from c105 breakout)
• (fuel inj jumper harn, midway between fuel inj no 3 breakout & map sensor breakout)
• 3.1l
• 3.8l
• A10
• A11
• C11
• Cool fan 1 fuse 15a
• Cool fan 2 fuse 15a
• Cool fan 1 relay
• Cool fan 2 relay
• Cool fan 3 relay
• E10
• Ect sig
• Engine controls (map sensor)
• Engine coolant temperature (ect) sensor (top left side of engine, below throttle body)
• F12
• G113 (lower left front of engine)
• High spd
• Hot at all times
• Left coolant fan
• Left cooling fan diode (3.1l)
• Low spd
• Nca
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Right coolant fan
• Right cooling fan diode (3.1l)
• S101
• S102
• S103
• S105
• Underhood fuse block (right side of engine compt, mounted to strut tower)

CRUISE CONTROL

Cruise Control Wiring Diagram for Buick Century 2003

List of elements for Cruise Control Wiring Diagram for Buick Century 2003:

• (ashtray jumper harn, 5 cm from c242) s295
• (front of left strut tower)
• (i/p harn, 1 cm from sp205 breakout) s240
• Anti-lock brakes system
• B10
• Brake signal input
• Cruise control module
• Cruise control release switch (on brake pedal bracket)
• Cruise control switch
• Cruise fuse 10a
• Cruise on/off
• Disable input
• Disable output
• Engage input
• Engaged output
• Exterior lights system
• G201 (below dash, left of steering column)
• Ground
• Hot at all times
• Hot in run
• I/p fuse block (behind right side of dash)
• Ignition
• Instrument panel cluster
• Off
• Pnk
• Powertrain control module (pcm) (front left side of engine compt)
• R/a
• Release signal
• Resume/accel
• S205 (i/p harness, 14 cm from g201 breakout)
• S283
• Set sw
• Set/coast
• Stop lamps fuse 15a
• Stoplight switch (brake pedal support bracket)
• Vehicle speed input
• Vehicle speed sensor (vss) (on transaxle right axle case extension)
• Vss
• Vss high
• Vss low
• Vss output

DEFOGGERS

Defoggers Wiring Diagram for Buick Century 2003

List of elements for Defoggers Wiring Diagram for Buick Century 2003:

• (behind the right side of glove box)
• (left front door sill) g301
• (left side of rear shelf) g401
• (man a/c)
• C1 (auto a/c) c2
• D nca
• D15 d
• Driver outside rearview mirror
• G200
• Heated mirror fuse 10a
• Hot at all times
• Hot in run
• Hvac control module
• Hvac fuse 10a
• I/p fuse block
• Mirror defogger
• Nca
• On ind
• On/off momentary defogger switch
• Passenger outside rearview mirror
• Radio noise suppressor (in right "c" pillar)
• Rear defog circuit breaker 30a
• Rear window defogger
• Rear window defogger relay (behind glove box, mounted to underside of cross-car beam)
• S230
• S233
• S268 (i/p harn, near blwr motor) nca
• S504
• S604
• Solid state timer
• Under driver's seat)

ENGINE PERFORMANCE

3.1L VIN J

3.1L VIN J, Engine Performance Wiring Diagram (1 of 4) for Buick Century 2003

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (1 of 4) for Buick Century 2003:

• (on transaxle stud)
• (pin 14-15 not used)
• (pin 2-3 not used)
• (pin 23-27 not used)
• (pin 34-37 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (right side of engine, on ignition control module bracket)
• 1-2 ss valve control
• 2-3 ss valve control
• 24x ref
• 3x ref
• A/c press return
• A/t iss hi sig
• A/t iss low sig
• Bank 1 ks signal
• Bypass control
• Camshaft position sensor (cmp) (front of eng, below intake plenum)
• Cmp signal
• Connector (dlc) (under left side of dash, right of steering column)
• Cooling fan system
• Crankshaft position (ckp) sensor (7x) (right side of engine, below manifold)
• Crankshaft position sensor (24x) (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• Data link
• Ecm fuse 22 10a
• Egr val ign pos volt
• Elek ign fuse 25 15a
• Eng emis fuse 30 10a
• Evap can purge control
• F/injr fuse 28 15a
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 3 control
• Fuel inj 5 control
• Fuel inj 6 control
• G111
• G113
• High speed fans control
• Ho2s 1 sig low
• Ho2s 2 sig low
• Hot at all times
• Hot in off, run bulb test, or start
• Hot in run, bulb test or start
• I/p fuse block (behind right side of dash, in right door opening)
• Iac valve b high
• Iat sensor ground
• Ic control
• Ign 0 fuse 10a
• Ignition amplifier and switching module
• Ignition control module (top right side of eng)
• Ignition power
• Knock sensor (ks) bank 1 (left side lower eng, above starter)
• Low speed fans control
• Maf sensor signal
• Map sensor
• Map/ect sensor signal
• Pcm ground
• Pnk
• Pnk b
• Power (battery)
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Red
• Ref low
• S106
• S270
• Sensor ground
• Sensor return
• Serial data (class 2)
• Spark plugs
• Splice pack sp205
• Tcc brake switch input
• Tp sensor signal
• Tr switch input b
• Underhood fuse block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.1L VIN J, Engine Performance Wiring Diagram (2 of 4) for Buick Century 2003

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (2 of 4) for Buick Century 2003:

• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• Evaporative emissions (evap) canister purge solenoid (top right side of eng, behind ignition control module)
• Evaporative emissions (evap) canister vent solenoid (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors
• G113 (on transaxle stud)
• Iss sensor
• Pnk
• Pressure control solenoid valve
• S106
• S109
• Stoplight switch (on brake pedal support bracket)
• Transmission internal mode switch
• Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.1L VIN J, Engine Performance Wiring Diagram (3 of 4) for Buick Century 2003

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (3 of 4) for Buick Century 2003:

• (body harn, under rear seat)
• (engine harn, 4 cm from pcm breakout)
• (fuel inj harn, 2 cm from fuel inj 3 breakout)
• (left side of eng, in air cleaner duct) mass airflow (maf) sensor
• (lower left side of eng, above starter) engine oil pressure indicator switch
• (on throttle body assembly) idle air control (iac) valve
• (optional) (on bottom of eingine oil pan) engine oil level indicator switch
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• B12
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Exhaust gas recirculation (egr) valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G113 (on transaxle stud)
• Generator
• Instrument cluster
• Intake air temperature (iat) sensor (left rear of eng compt, in air cleaner duct)
• L b
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top right side of eng, above valve cover)
• Pnk
• Red
• S106
• S121
• S167
• S409
• Tan
• Throttle position (tp) sensor (on throttle body assembly)
• Underhood fuse block c1 (mounted to right strut tower)

3.1L VIN J, Engine Performance Wiring Diagram (4 of 4) for Buick Century 2003

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (4 of 4) for Buick Century 2003:

• (behind right side of dash, in right door opening)
• (not used)
• (on transaxle stud)
• (pin 12-15 not used)
• (pin 31-32 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 64-65 not used)
• (pin 8-9 not used)
• (right side of rear shelf)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5 volt ref
• 5v ref a
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• A11
• Air conditioning system
• Air pmp relay
• Auto transaxle fluid temperature sensor
• Automatic transmission
• Ckp sens
• Ckp sens return
• Cluster fuse 10a
• Cmp/ckp sensor batt (+)
• Cmp/ckp sensor ground
• Crank
• Crank signal fuse 10a
• Cruise control system
• Cruise status
• D10
• Ect sensor signal
• Egr pintle position signal
• Egr val control
• Eng oil level ind in
• Eng oil press switch in
• Evap can vent sol control
• F/pmp fuse 35 15a r2
• F/pmp relay
• Fuel inj 4 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump prime connector
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• G113
• G113 (on transaxle stud)
• G402
• Gen terminal l output
• Heated oxygen sensor 1 (ho2s 1) (in right side exhaust manifold)
• Heated oxygen sensor 2 (ho2s 2) (in exhaust system, rear of catalytic converter)
• Ho2s 1 signal
• Ho2s 2 signal
• Ho2s htr lo ctrl
• Hot at all times
• Hot in run, bulb test or start
• Hot in run, bulb test, or start
• Hot in start
• I/p fuse block
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ignition positive volt
• Map sensor signal
• Mil control
• Nca
• Oxy sen fuse 29 15a
• Pcm- bcm fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Red
• S105
• S106
• S115
• S234
• Sensor ground
• Starter enable control
• Starting/ charging system
• Tan
• Tcc pwm sol val control
• Tcc rel sw sig
• Tcc solenoid valve
• Tft sensor signal
• Tp sensor signal
• Tps ref tp switch
• Tr switch input a
• Tr switch input c
• Tr switch input p
• Trans fuse 26 10a
• Underhood fuse block (mounted to right strut tower)

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Buick Century 2003

List of elements for Back-up Lamps Wiring Diagram for Buick Century 2003:

• (body harness, under left rear seat) s424
• A12 c2
• B1 c2
• Back-up lamp relay (behind left side of dash)
• Body control module (bcm) (behind left side of dash)
• G402 (right side of rear shelf)
• Hot at all times
• Left back-up lamp
• Mirrors system (automatic day/night mirror)
• R/cmpt rel fuse 7.5a
• Right back-up lamp
• S904 (back-up lamp harness, in trunk lid)
• S915
• Underhood fuse block (mounted to right strut tower)
• W/ automatic day/night mirror

Exterior Lamps Wiring Diagram for Buick Century 2003

List of elements for Exterior Lamps Wiring Diagram for Buick Century 2003:

• (below dash, left side of steering column) g201
• (chmsl harn, center of rear window trim panel, 12 cm from chmsl breakout) s417
• (i/p harn, right of steering column)
• (right side of rear shelf)
• A c1
• A10
• A11
• A12
• A12 c3
• A13
• A14
• A15
• Ambient light sensor (top right side of dash, at base of windshield)
• B c1
• Body control module (bcm) (behind left side of dash, left of steering column)
• C2 f12
• C2 f8
• Center high mounted stoplamp (chmsl)
• Corn- ering lamp
• Cornering lamp
• D12
• Drl ambient light ground ref
• Drl ambient light signal
• E10
• E11
• E12
• E13
• Exterior lamp off input
• F11
• Frt park lps fuse 10a
• G side marker lamp
• G101 (left front side of radiator support)
• G201 (below dash, left side of steering column)
• G401 (left side of rear shelf)
• G402
• G402 (right side of rear shelf)
• Hazard
• Hazard fuse 15a
• Headlamp control
• Headlamp relay (behind glove box, mounted to underside of cross-car beam)
• Headlamp switch
• Headlamp switch input
• Hot at all times
• Hot in run, bulb test or start
• I/p fuse block
• I/p fuse block (behind right side of dash)
• Instrument panel cluster (ipc)
• Left
• Left head- lamp assembly
• Left rear marker lamp
• Left rear park lamps
• Left tail/ turn signal/ stop- lamp
• Left turn indicator
• Left turn signal
• Lp park fuse 20a
• Marker lamp
• Nca
• Normal
• Off
• Park
• Park lamp relay (behind right side of dash)
• Park lamp relay control
• Park/ turn signal lamp
• Pnk
• Power distribution
• Rear license lamps
• Right
• Right head- lamp assembly
• Right rear marker lamp
• Right rear park lamps
• Right side of steering column, 5 cm from ground breakout) s291
• Right tail/ turn signal/ stop- lamp
• Right turn indicator
• Right turn signal
• S124
• S205 (dash harness, near steering column)
• S221
• S267
• S283
• S403
• S406
• S408
• S416
• Side g
• Stop lamps fuse 15a
• Stoplight switch (on brake pedal support bracket)
• Tail lamps, lic lamps fuse 15a
• Turn signal
• Turn signal/ hazard flasher module (below left side of dash)
• Turn signal/multifunction switch
• Turn signals, corn lps fuse 10a
• Underhood fuse block
• Underhood fuse block (mounted to right strut tower)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 2) for Buick Century 2003

List of elements for Ground Distribution Wiring Diagram (1 of 2) for Buick Century 2003:

• (century)
• (cj2)
• (cj3)
• (engine harn, front of engine compt, 4 cm from c105 breakout)
• (forward lamp harn, below left headlamp, 7 cm from left headlamp breakout)
• (front floor console harn, in console 6.5 cm from accessory power outlet breakout)
• (regal)
• A/c clu diode
• A/c compressor clutch
• A18
• Ashtray lamp (century)
• Automatic transmission
• Auxiliary power outlet (century)
• Auxiliary power outlet (regal)
• Battery
• Blower motor control processor
• Blower motor resistor assembly
• C11
• C113
• C206
• Cigar lighter (century)
• Cigar lighter (regal)
• Cj2
• Cj3
• Cool fan 2 relay
• Data link connector (dlc)
• Electronic brake control module
• Eng compt, at base of battery)
• Engine oil level sensor
• Engine oil pressure switch
• F/pump relay
• Fuse block-underhood
• G100
• G101 (left front side of radiator support)
• G111 (right side of engine, on ignition control module bracket)
• G113 (left of starter, on trans- axle stud)
• G113 (left of starter, on transaxle stud)
• G200 (behind right side of dash compt)
• Heated oxygen sensor 1
• Heated oxygen sensor 2
• Horns
• Hvac control module
• I/p compartment lamp switch
• Ign main relay
• Ignition control module (icm)
• Ignition lock cylinder control actuator (regal)
• Inflatable restraint sensing & diagnostic module
• Inflatable restraint steering wheel module coil
• Left air temperature actuator
• Left cornering lamp
• Left fog lamp (regal)
• Left headlamp
• Left park/ turn signal lamp
• Left side marker lamp
• Left steering wheel controls
• Mass airflow (maf) sensor
• Nca
• Power drop connector
• Powertrain control module (pcm)
• Red
• Regal
• Right air temperature actuator
• Right cooling fan
• Right cornering lamp
• Right fog lamp (regal)
• Right headlamp
• Right park/ turn signal lamp
• Right side marker lamp
• Right steering wheel controls
• S105
• S106 (eng harn, 7 cm from pcm breakout)
• S124
• S334
• S335
• Windshield washer fluid level switch
• Windshield washer fluid pump

Ground Distribution Wiring Diagram (2 of 2) for Buick Century 2003

List of elements for Ground Distribution Wiring Diagram (2 of 2) for Buick Century 2003:

• (back-up lamp harness, in rear compt lid, 29.5 cm from p915)
• (body harn, under driver's seat, 10 cm from c311 breakout) s303
• (left front door harn, 8 cm from window switch breakout)
• (left tail- lamp harn,
• (right side of rear shelf) g402
• 13 cm from right s383
• 3 cm from p401) s403
• 5 cm from c420 breakout)
• A12
• Audio amplifier (w/ amp)
• Automatic headlamp relay
• Body control module (bcm)
• Brake fluid level switch
• C201
• Center high mounted stop lamps
• Chmsl)
• Cruise control module
• Data link connector (dlc)
• Driver information display switch (regal)
• Driver seat adjuster switch
• Driver seat belt switch
• Driver seat heater control module
• Driver seat heater switch
• Driver window master switch
• Driver's heated seat back element
• Driver's heated seat thermister
• E16
• Exc onstar
• Fixed antenna
• Fog lamp switch (regal)
• Fuel pump
• G201 (below dash, left side of steering column)
• G203 (below dash, right side of steering column)
• G301 (left front door sill)
• G401 (left side of rear shelf)
• G402 (right side of rear shelf)
• Ground (on steering column)
• Headlamp dimmer switch
• Headlamp switch
• Headlamp switch breakout)
• Headliner harn, left side of windshield header, 10.5 cm from left sunshade mirror breakout)
• Ignition key alarm switch
• Inside rearview mirror
• Instrument panel cluster (ipc)
• Left back-up lamp
• Left front door lock
• Left front door lock switch
• Left license lamp
• Left rear door lock (ajar indicator switch)
• Left rear park lamp
• Left rear side marker lamp
• Left roof rail courtesy/ reading lamp
• Left tail/ stop/turn signal lamp
• Left vanity mirror lamp
• Nca
• Onstar
• Outside remote control rearview mirror switch
• Passenger seat adjuster switch
• Passenger seat heater control module
• Passenger seat heater switch
• Passenger's heated seat back element
• Passenger's heated seat thermistor
• Radio
• Radio antenna module
• Rear compartment lid ajar switch
• Rear compartment lid lock release actuator
• Rear compartment lid release switch
• Rear wdo antenna
• Rear window defogger grid
• Remote control door lock receiver
• Right back-up lamp
• Right front door lock (ajar indicator switch)
• Right front door lock switch
• Right front window switch
• Right license lamp
• Right rear door lock (ajar indicator switch)
• Right rear park lamp
• Right rear side marker lamp
• Right roof rail courtesy/ reading lamp
• Right tail/ stop/turn signal lamp
• Right vanity mirror lamp
• S211 (i/p harness, 20 cm from inst cluster breakout)
• S330 (driver's seat adj harn, 20 cm from c311 breakout)
• S333 (pass seat harn, 20 cm from c312 breakout)
• S402 (right taillamp harn, 3 cm from p402)
• S504
• S604 (right front door harn, 8 cm from front pass wdo switch breakout)
• S905
• Sunroof module
• Tan
• Tire reset switch
• Traction control switch (regal)
• Turn signal/ hazard flasher module
• Vehicle communications interface module
• W/ heated seats
• W/o heated seats
• Wind- shield wiper motor

HEADLIGHTS

Headlights Wiring Diagram for Buick Century 2003

List of elements for Headlights Wiring Diagram for Buick Century 2003:

• A10
• A11
• Ambient light sensor (top right side of dash)
• B7 pnk
• Body control module (bcm) (behind left side of dash)
• D11
• F10
• F2 c3
• Fog lamp relay
• Fog lamp switch
• Fog lp cntrl
• Fog lp fuse 10a
• G101 (front left side of radiator support)
• G201 (below dash, left side of steering column)
• Hdlp l fuse 15a
• Hdlp r fuse 15a
• Head
• Headlamp cntrl
• Headlamp dimmer switch
• Headlamp relay (behind glove box)
• Headlamp sw input
• Headlamp switch
• High
• High beam
• High beam indicator
• Hot at all times
• I/p fuse block (behind right side of dash)
• Illum
• Instrument panel cluster
• Interior lights system
• Left fog lamp
• Left headlamp
• Light sens grd ref
• Light sensor sig
• Low
• Low beam
• Lp park fuse 20a
• Off
• Park
• Park brake switch
• Park brk sw in
• Pnk
• Power distribution system
• Radio,hvac,rfa, cluster cel tel fuse 15a
• Right fog lamp
• Right headlamp
• S124
• S202
• S221 (i/p harn, right side of steering column, approx 17cm from dlc breakout)
• S283
• Tan
• Underhood fuse block (mounted to right strut tower)

HORN

Horn Wiring Diagram for Buick Century 2003

List of elements for Horn Wiring Diagram for Buick Century 2003:

• (century/regal) a17
• (steering column)
• Body control module (left of steering column)
• C201
• C8 c3
• G101 (left side of radiator support)
• G203 (below dash, right side of steering column)
• High note horn
• Horn fuse 15a
• Horn output
• Horn relay
• Horn switch
• Horns (behind right front fascia)
• Hot at all times
• Inflatable restraint steering wheel module
• Low note horn
• S124
• S211
• Slip ring
• Spring
• Steering column
• Underhood accessory wiring junction block (mounted on right strut tower)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram for Buick Century 2003

List of elements for Instrument Cluster Wiring Diagram for Buick Century 2003:

• (below dash, left side of steering column) g201
• (below dash, right side of steering column)
• A10
• A11
• A12
• Air bag ind
• Antilock ind
• B10
• B11
• B12
• Battery
• Bcm class2 serial data
• Bcm or ipc serial data
• Body control module (behind left side of dash, left of steering column)
• Brake fluid
• Brake fluid level switch (in brake fluid reservoir)
• Brake ind
• Change oil ind
• Charge ind
• Cluster fuse 10a
• Cluster logic
• Coolant temp ind
• Coolant temper- ature gauge
• Crank
• Crank signal, bcm, cluster fuse 10a
• Cruise control system
• Cruise ind
• D12
• Data link connector (under left side of dash, right of steering column)
• Dic e/m
• Dic mode
• Dic reset
• Door/trunk ajar ind
• Driver information display switch (regal only)
• E/m
• Ebcm class2 serial data
• Electronic brake control module (ebcm) (at left side of engine compartment, near strut tower)
• Engine controls system
• Exterior lights system
• Fuel gauge
• G200 (behind right side of dash)
• G203
• G203 (below dash, right side of steering column)
• Gnd
• Ground
• Headlights system
• High beam ind
• Hot at all times
• Hot in off, run or start
• Hot in run, bulb test or start
• Hot in start
• Hvac control module
• I/p fuse block
• Ign
• Ign 01, bcm & pcm, cluster fuse 10a
• Ignition voltage
• Igntion 1
• Illumination (5 bulbs)
• Inflatable restraint sensing & diagnostic module (sdm) (below carpet, under right front seat)
• Instrument cluster
• Interior lights system
• Left turn ind
• Left turn signal
• Low coolant ind
• Low fuel ind
• Low oil ind
• Low oil pressure ind
• Low tire ind
• Low trac ind
• Low washer ind
• Mal- function indcator lamp (mil) (service engine soon)
• Mode
• Pcm class 2 serial data
• Pcm class2 serial data
• Pcm, abs bcm & cluster logic serial data
• Perf shift ind
• Pk lps
• Pnk
• Powertrain control module (left front side of engine compt, in air cleaner assy)
• Radio, hvac, rfa, cluster, cel tel fuse 15a
• Reset
• Right turn ind
• Right turn signal
• S202
• S211
• S230
• S234
• S270
• S283
• S295 (ashtray jumper harness, inside ashtray)
• Sdm class2 serial data
• Seat belt ind
• Security ind
• Serial data
• Service vehicle soon ind
• Speed sensor
• Speedo- meter gauge
• Splice pack (sp205) (below dash, right of steering column)
• Srl data
• Tacho- meter gauge
• Trac off ind
• Trip reset input
• Trip reset switch
• Vehicle speed
• Vf display
• Windshield washer fluid
• Windshield washer fluid level switch (right front of eng compt, in washer fluid reservoir)

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram (1 of 2) for Buick Century 2003

List of elements for Courtesy Lamps Wiring Diagram (1 of 2) for Buick Century 2003:

• (body harn, below right front seat) s322
• Body control module (bcm) (behind left side of dash, left of steering column)
• Computer data lines system
• Court lmps feed
• Court lmps on
• Dome
• Door open input
• Driver door lock
• Driver dr open
• Front passenger door lock
• G200 (behind right side of dash)
• G201 (below dash, left side of steering column)
• G301 (left front door sill)
• Headlamp switch
• Hot at all times
• I/p compart- ment lamp switch
• I/p fuse block
• Inadv power bus fuse 15a
• Left courtesy lamp
• Left rear door lock
• Off
• Regal, century custom
• Right courtesy lamp
• Right rear door lock
• S214 (i/p harn, right side of steering column)
• S230
• S283
• S303
• S504
• S604
• Serial data
• Theater dim (grd)
• Theater dim 1

Courtesy Lamps Wiring Diagram (2 of 2) for Buick Century 2003

List of elements for Courtesy Lamps Wiring Diagram (2 of 2) for Buick Century 2003:

• (2002) a
• (2002) c
• (2003) a
• (2003) c
• (quarter courtesy & reading lamp harn, approx 35 cm from 8-pin in-line conn, behind right "c" pillar) s386
• (w/ onstar)
• (w/o onstar)
• A1 c3
• Base
• Body computer module (bcm) (behind left side of dash, left of steering column)
• Body control module (behind left side of dash)
• Diode
• Dome lamp
• Except base
• G402 (right side of rear shelf)
• Inside rear view mirror
• Left roof rail courtesy/ reading lamp
• Left vanity mirror lamp
• Nca
• Rear compartment courtesy lamp
• Rear compartment lid ajar switch
• Rear compartment occupant sensor (at left side of rear compt)
• Right roof rail courtesy/ reading lamp
• Right vanity mirror lamp
• S321 (body harn, under right front door pillar)
• S385
• S392 (quarter courtesy & reading lamp harn, approx 5 cm from 8-pin in-line conn, behind right "c" pillar)
• S400 (body wiring harness, approx 4 cm (1.5 in) from rear compartment courtesy lamp breakout)
• S414
• S433 (occupant sensor pigtail used in place of sensor)
• S434 (occupant sensor pigtail used in place of sensor)
• S905
• W/ entrapment protection
• W/o entrapment protection

Instrument Illumination Wiring Diagram for Buick Century 2003

List of elements for Instrument Illumination Wiring Diagram for Buick Century 2003:

• (body harn, below right front seat) s302
• (cj2) c16
• (cj3)
• (i/p harn, right side of dash)
• 2002 regal /century, 2003 regal only
• Ashtray lamp (century)
• Dome
• Driver door lock switch
• Driver master window switch
• Driver seat heater switch
• Electronic traction control switch (regal)
• Fog lamp switch
• Front passenger door lock switch
• Front passenger window switch
• G200 (behind right side of dash)
• G201 (below dash, left side of steering column)
• G203 (below dash, right side of steering column)
• G301 (left front door sill)
• Grd
• Head
• Headlamp switch
• High
• Hot at all times
• Hvac control module
• I/p fuse block
• Illum
• Inflatable restraint steering wheel module coil
• Instrument cluster
• Low
• Lp park fuse 20a
• Off
• Outside rear view mirror switch
• Panel dimming fuse 7.5a
• Park
• Passenger seat heater switch
• Prndl lamp (regal)
• Radio
• Radio control switches
• Red
• S211
• S230
• S241 (i/p harn, below radio)
• S267
• S283
• S303
• S334
• S504
• S506 (left front door harn, in left front door)
• S604
• S606 (right front door harn, in right front door)
• Strg whl cont fuse 2a
• Tail, lic lamps fuse 15a
• Underhood fuse block
• Vf dim dis sig
• Vf dim sig
• W/ heated seats
• W/o heated seats

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 3) for Buick Century 2003

List of elements for Power Distribution Wiring Diagram (1 of 3) for Buick Century 2003:

• (body harn, 6.5 cm from rr speaker breakout) s440
• (century)
• (cj3) (cj2)
• (console harn, inside console) 20 cm from c240) s336
• (i/p harness, right side of steering column, approximately 19 cm (8 in) from radio breakout
• (regal)
• 20a
• 60a
• A/c clutch fuse 23 10a
• A/c clutch relay 15
• Abs fuse 1
• Accessory power outlet
• Audio amplifier (u85)
• B (century) (regal) c
• Back-up lamp relay (regal)
• Batt 1 fuse 7 60a
• Batt 2 fuse 4 60a
• Batt 3 fuse 3 60a
• Battery
• Bcm pwr fuse 10a
• Blower motor control processor
• Blower motor resistor assembly
• Body control module (bcm)
• C2 l c12
• C201
• C206
• Cigar lighter
• Cigar ltr fuse
• Cj2
• Cj3
• Cool fan 1 fuse 6 25a
• Cool fan 1 relay 12
• Cool fan 2 fuse 24 15a
• Cool fan 2 relay 9
• Cool fan 3 relay
• Crank fuse 2 40a
• Crank relay 11
• Data link connector (dlc)
• Door locks fuse 20a
• Driver heated seat control module
• Driver seat adjuster switch
• E10
• E11
• E12
• Ecm fuse 22 10a
• Electronic brake control module (ebcm)
• F/pmp fuse 35 15a
• F/pmp relay 19
• F/pmp spd cont relay 18 (l67 w/ t96)
• Fog lamp relay 17
• Fog lp fuse 31 10a
• From batt 2 fuse 4 (diagram 1 of 3)
• From horn a fuse 27 (diagram 1 of 3)
• Fuse block- i/p
• Fuse block- underhood
• Fuse block: i/p
• Fusible link (10 ga- rust)
• G200 (behind right side of dash compt)
• Gen fuse 21 10a
• Generator
• Hazard fuse 15a
• Hdlp l fuse 36 15a
• Hdlp r fuse 32 15a
• Headlamp relay
• Headlamp switch
• High blower fuse 30a
• Horn fuse 27 15a
• Horn relay 16
• Hvac control module
• Inadv power bus fuse 15a
• Instrument panel cluster (ipc)
• L heated seat fuse 15a
• Left headlamp
• Lp park fuse 34 20a
• Nca
• Outside rearview mirror switch
• Park lamp relay
• Park/ neutral position switch (century)
• Passenger front heated seat control module
• Passenger front seat adjuster switch
• Power drop connector
• Power mirrors fuse 2a
• Power seat circuit breaker 30a
• Powertrain control module (pcm)
• R heated seat fuse 15a
• R/cmpt rel fuse 33 7.5a
• Radio
• Radio prem sound fuse 15a
• Rdo,hvac rfa,cluster data link fuse 15a
• Rear compartment lid release relay
• Rear defog circuit breaker 30a
• Rear window defogger relay
• Red
• Remote control door lock receiver (rcdlr)
• Right headlamp
• S202
• S230
• S269 (i/p harn, near blower motor, 13 cm from door lock rly breakout)
• S275
• S335 (regal) (century) s334
• Starter
• Stop lamps fuse 15a
• Stoplamp switch
• To hdlp l fuse 36 (diagram 1 of 3)
• To high blower fuse (diagram 1 of 3)
• To ign 2 fuse 8 (diagram 2 of 3)
• To onstar fuse, diagram (2 of 3)
• To retained accessory power (rap) relay (diagram 2 of 3)
• Turn signal/ hazard flasher module

Power Distribution Wiring Diagram (2 of 3) for Buick Century 2003

List of elements for Power Distribution Wiring Diagram (2 of 3) for Buick Century 2003:

• (body harn, on tunnel above front seats, 10 cm from c250 breakout) s323
• (body harn, under left rear seat, 7 cm from c405 breakout)
• (cj2)
• (cj2) (cj3)
• (i/p harn, behind right side of dash, 4 cm from blower motor control module)
• (i/p harn, near blower motor, 4 cm from door lock relay breakout)
• (i/p harn, near steering column, 4 cm from c201 breakout)
• (i/p harn, right side of steering column, 18 cm from g200 breakout)
• (not used)
• (regal)
• (w/rap)
• A/t shift lock control switch
• A10
• Acc
• B10
• Bcm acc fuse 10a
• Body control module (bcm)
• Body control module (bcm) (below left side of dash)
• C201
• C206
• C5 c (cj3)
• Crank signal, bcm, cluster fuse 10a
• Cruise control module
• Cruise control release switch
• Cruise control switch
• Cruise fuse 10a
• Driver seat heater switch
• From gen d fuse 21 (diagram 1 of 3)
• From ignition switch (diagram 2 of 3)
• From inadv power bus fuse (diagram 1 of 3)
• From r heated seat fuse diagram (1 of 3)
• Fuse block, under- hood c1
• Fuse block- i/p
• Fuse block- underhood
• Fuse- block under- hood
• Heater- a/c control (cj3)
• Hvac control module
• Hvac fuse 10a
• I/p harn, right side of steering column, 13 cm from instrument cluster breakout)
• Ign 0,cluster, pcm & bcm fuse 10a
• Ign1 fuse 5 30a
• Ign2 fuse 8 60a
• Ignition switch
• Inflatable restraint steering wheel module coil
• Inside rearview mirror
• Instrument panel cluster (ipc)
• Left air temperature actuator
• Left front window switch
• Left radio control switch
• Lock
• Low blower fuse 20a
• Nca
• Off
• Onstar fuse 15a
• Park lock fuse (regal) 10a
• Passenger seat heater switch
• Pnk
• Power drop connector
• Power drop fuse 10a
• Powertrain control module (pcm)
• Pwr windows pwr sunroof circuit breaker 30a
• Radio
• Radio fuse (w/o rap) 2a
• Radio fuse 2a
• Rear window defogger relay
• Red
• Retained accessory power (rap) relay
• Right air temperature actuator
• Run
• S220
• S234
• S240
• S249
• S263
• S270
• S410
• Start
• Sunroof module
• To crank signal fuse (diagram 2 of 3)
• To ign main relay 13 (diagram 3 of 3)
• To low blower fuse (diagram 2 of 3)
• To s228 (diagram 3 of 3)
• Vacuum control assembly (cj2)
• Vehicle communi- cations interface module
• W/ electric o/s mirrors
• W/ fold away mirrors
• W/ rap
• W/ sun- roof
• W/o rap
• Wind- shield wiper/ washer switch
• Windshield wiper motor
• Wiper fuse 25a

Power Distribution Wiring Diagram (3 of 3) for Buick Century 2003

List of elements for Power Distribution Wiring Diagram (3 of 3) for Buick Century 2003:

• (3.1l)
• (3.1l: fuel injector wiring harn, 2 cm from fule injecto 2 breakout) (3.8l: eng wiring harn, top left of engine, 6 cm from c110 breakout)
• (3.8l)
• (i/p harness, right side of dash)
• A/c clutch relay 15
• A/t shift control switch (regal)
• A11
• Abs fuse 10a
• Air bag fuse 10a
• Automatic transaxle
• B12
• Body control module (bcm)
• Brake- to-shift relay
• Btsi park lock fuse 10a
• C113
• Cluster fuse 10a
• Crank relay
• Electronic brake control module (ebcm)
• Elek ign fuse 25 15a
• Eng emis fuse 30 10a
• Evaporative emissions (evap) canister purge solenoid valve
• Evaporative emissions (evap) canister vent solenoid valve
• F/inj fuse 28 15a
• From ign 1 fuse 5 e (diagram 2 0f 3)
• From ignition switch (diagram 2 of 3)
• Fuel injector
• Fuse block- i/p
• Fuse block- underhood
• G113 (left of starter, on trans- axle stud)
• Heated oxygen sensor 1 (ho2s 1)
• Heated oxygen sensor 1 (ho2s 2)
• Ign main relay 13
• Ignition control module (icm)
• Inflatable restraint sensing & diagnostic module
• Instrument panel cluster (ipc)
• Mass airflow (maf) sensor
• Nca
• Oxy sen fuse 29 15a
• Pcm,bcm u/h relay fuse 10a
• Pnk
• Powertrain control module (pcm)
• Regal vin k
• S106
• S109
• S228
• Secondary air injection bypass valve solenoid
• Stoplamp switch
• Stoplamp switch (century)
• Supercharger bypass valve (3.8l)
• Trans fuse 26 10a
• Turn signal hazard flasher module
• Turn signals, corn lps fuse 10a

POWER DOOR LOCKS

Power Door Locks Wiring Diagram for Buick Century 2003

List of elements for Power Door Locks Wiring Diagram for Buick Century 2003:

• (body harn, center floor on left side of tunnel) s315
• (body harness, below right door speaker, 44cm from power door breakout) s314
• All drs lock
• Battery
• Battery (b+)
• Bcm fuse 10a (oldsmobile)
• Bcm pwr fuse 10a (buick)
• Body control module (behind left side of dash, left of steering column)
• Buick
• Door lock fuse 20a
• Dr lock sw in
• Dr unlk sw in
• Driver door lock switch
• Driver dr unlk
• Front passenger door lock switch
• G201 (left side of steering column)
• G203 (right side of steering column)
• G301 (forward of driver's seat)
• Ground
• Hot at all times
• I/p fuse block (behind right of dash in right door opening)
• Interior lights system
• Left front door lock
• Left rear door lock
• Lock
• Oldsmobile
• Pass drs unlk
• Radio, hvac rfa, cluster, data link fuse 15a
• Remote control door lock receiver (left side of dash, on right side of instrument cluster)
• Right front door lock
• Right rear door lock
• S202
• S211
• S269
• S283
• S303
• S504
• Serial data
• Tan
• Trunk lid rel
• Trunk/ tailgate/ fuel doors system
• Unlock

POWER MIRRORS

Electrochromic Mirror Wiring Diagram for Buick Century 2003

List of elements for Electrochromic Mirror Wiring Diagram for Buick Century 2003:

• (main body harness, approximately 9 cm from the rear compt courtesy lamp breakout) s424
• (windshield side) ambient sensor
• C1 b
• C1 f6
• C2 a6
• Exterior lights system
• G402 (right side of rear shelf)
• Gnd
• Headlight sensor (mirror side)
• Hot at all times
• Hot in run
• Hvac fuse 10a
• I/p fuse block (behind right side of dash, in right door opening)
• Inside rearview mirror (day-night)
• Interior lights system
• Low ref
• Mirror on
• Nca
• Off
• Outside rearview mirror
• Park/ neutral positon (pnp) switch (on top right rear of transaxle)
• Pnk
• R/cmpt rel fuse 7.5a
• Resets to daytime high reflectivity in reverse
• S233
• S323
• S414
• Signal
• Solid state
• Underhood fuse block (mounted to right strut tower)
• W/ gps
• W/ gps w/o gps
• W/ heated seats
• W/ sunroof
• W/o gps
• W/o heated seats
• W/o sunroof

Power Mirrors Wiring Diagram for Buick Century 2003

List of elements for Power Mirrors Wiring Diagram for Buick Century 2003:

• Day/night mirror system
• Driver outside rearview mirror
• Ecb
• G301 (left front door sill)
• Hot at all times
• I/p fuse block (behind right side of dash, in right door opening)
• Interior lights system
• Left mirror
• Low ref
• Nca
• Outside rearview mirror switch
• Passenger outside rearview mirror
• Pnk
• Power mirrors fuse 2a
• Right mirror
• Right/ left motor
• S504
• Signal
• Up/ down motor

POWER SEATS

6-Way Power Seat Wiring Diagram for Buick Century 2003

List of elements for 6-Way Power Seat Wiring Diagram for Buick Century 2003:

• A nca
• Back
• Down
• Driver seat adjuster motor assembly
• Driver seat adjuster switch
• Entire seat
• For- ward
• Front height
• Front passenger seat adjuster motor assembly
• Front passenger seat adjuster switch
• Front vertical adjuster motor
• G301 (left front door sill)
• Horizontal adjuster motor
• Hot at all times
• I/p fuse block
• Nca
• Nca b
• Nca e
• Nca g
• Power seats circuit breaker 30a
• Rear height
• Rear vertical adjuster motor
• S303
• S326
• S330
• Tan

Heated Seats Wiring Diagram for Buick Century 2003

List of elements for Heated Seats Wiring Diagram for Buick Century 2003:

• Driver heated seat back element
• Driver heated seat control module
• Driver heated seat cushion cover
• Driver heated seat cushion element
• Driver heated seat switch
• Driver heated seat thermistor
• Front passenger heated seat control module
• G301 (left front door sill)
• Ground
• Hot at all times
• Hot in run
• Hvac fuse 10a
• I/p fuse block
• Interior lights system
• Lh heated seat fuse 15a
• Lo/hi input
• Nca
• On input
• Passenger heated seat back element
• Passenger heated seat cushion cover
• Passenger heated seat cushion element
• Passenger heated seat switch
• Passenger heated seat thermistor
• Pnk
• Rh heated seat fuse 15a
• S303
• S323
• S333
• Sensor input

POWER TOP/SUNROOF

Power Top/Sunroof Wiring Diagram for Buick Century 2003

List of elements for Power Top/Sunroof Wiring Diagram for Buick Century 2003:

• (not used)
• Battery
• Close
• G402 (right side of rear shelf)
• Gnd
• Hot in accy, run, & retained accessory power
• I/p fuse block (behind right side of dash, in right door opening)
• Ls1
• Ls2
• Ls3
• Open
• Pos 1
• Pos 2
• Pos 3
• Power windows system
• Pwr windows pwr sun roof circuit breaker 30a
• Red
• S410
• S414
• Sun roof module (center rear of sun roof)
• Sun roof motor (center rear of sun roof module)
• Sun roof switch
• Sunroof limit switch assembly (in sunroof motor transmission

POWER WINDOWS

Power Windows Wiring Diagram for Buick Century 2003

List of elements for Power Windows Wiring Diagram for Buick Century 2003:

• (body harn, center of vehicle floor)
• Down
• Ecb
• Express
• Express down module
• G301 (left front door sill)
• Hot in acc or run or during rap
• I/p fuse block (behind right side of dash, in right door opening)
• Illumination lamp
• Interior lights system
• Left front
• Left front window motor
• Left front window switch
• Left rear
• Left rear window motor
• Left rear window switch
• Lock out switch
• Pwr windows pwr sunroof circuit breaker 30a
• Right front
• Right front window motor
• Right front window switch
• Right rear
• Right rear window motor
• Right rear window switch
• S303
• S307
• S410
• S504
• S604
• Tan
• Tan e

RADIO

Radio Wiring Diagram, with Amplifier for Buick Century 2003

List of elements for Radio Wiring Diagram, with Amplifier for Buick Century 2003:

• (below dash, right side of steering column)
• Am/fm
• Ant in
• Ars
• Audio amplifier (below rear speaker shelf, in trunk)
• Audio out
• Audio sig
• Bare
• Battery
• Computer data lines system
• E & c data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front window antenna grid
• Fuse out
• G203
• G203 (below dash, right side of steering column)
• Ground
• Hot at all times
• Hot in acc or run
• I/p fuse block (behind right side of dash, in right door opening)
• Illum
• Inflatable restraint steering wheel control module
• Interior lights system
• Left front midrange speaker
• Left front tweeter speaker
• Left radio control switches
• Left rear speaker
• Lf audio
• Lf spkr
• Lf tweeter
• Lr audio
• Lr feed
• Lr rtn
• Lr spkr
• Mid- range
• Mute
• Nca
• Radio
• Radio antenna module (on rear window header panel)
• Radio fuse 2a
• Radio prem fuse 15a
• Radio pwr
• Radio, hvac, rfa, cel tel, cluster fuse 15a
• Rap pwr
• Rear window antenna grid
• Red
• Rf audio
• Rf feed
• Rf low
• Rf rtn
• Rf spkr
• Rf tweeter
• Right front midrange speaker
• Right front tweeter speaker
• Right radio control switches
• Right rear speaker
• Rr audio
• Rr feed
• Rr rtn
• Rr spkr
• S202
• S418
• S440
• Scan
• Seek dn
• Seek up
• Source
• Strg ctrl
• Sub feed
• Sub rtn
• Sub- woofer
• Tan
• Used not
• Vehicle interface unit (viu) (in rear compt, mounted to left rear wheelhouse)
• Vol dn
• Vol up
• W/ adaptive reception system
• W/o adaptive reception system

Radio Wiring Diagram, without Amplifier for Buick Century 2003

List of elements for Radio Wiring Diagram, without Amplifier for Buick Century 2003:

• A c1
• A c2
• Am/fm
• Ant in
• Ars
• B c2
• Battery
• C1 a
• C1 b
• C2 a
• C2 b
• Computer data lines system
• E & c data
• E10
• E11
• E12
• E13
• E14
• E15
• E16
• F10
• F11
• F12
• F13
• F14
• F15
• F16
• Front window antenna grid
• Fuse out
• G203 (below dash, right side of steering column)
• G203 (below dash, right side of steering column)
• Ground
• Hot at all times
• Hot in acc or run
• I/p fuse block (behind right side of dash, in right door opening)
• Illum
• Inflatable restraint steering wheel control module
• Interior lights system
• Left front door speaker
• Left front tweeter
• Left radio control switches
• Left rear speaker
• Lf spkr
• Lr spkr
• Mute
• Nca
• Not used
• Radio
• Radio antenna module (on rear window header panel)
• Radio fuse 2a
• Radio pwr
• Radio, hvac, rfa, cel tel, cluster fuse 15a
• Rap pwr
• Rear window antenna grid
• Red
• Rf spkr
• Right front door speaker
• Right front tweeter
• Right radio control switches
• Right rear speaker
• Rr spkr
• S202
• S418
• Scan
• Seek dn
• Seek up
• Source
• Strg ctrl
• Tan
• Vol dn
• Vol up
• W/ adaptive reception system
• W/o adaptive reception system

SHIFT INTERLOCK

Ignition Lock Solenoid Wiring Diagram for Buick Century 2003

List of elements for Ignition Lock Solenoid Wiring Diagram for Buick Century 2003:

• A/t shift lock control switch (center of console)
• C 1995 vftc
• G200 (behind right side of dash)
• Hot in off, run or start
• I/p fuse block (right side of dash, in right door opening)
• Ignition lock cylinder control actuator
• Ignition lock cylinder control switch (closed in park)
• Park lock fuse 10a
• S230

Shift Interlock Wiring Diagram for Buick Century 2003

List of elements for Shift Interlock Wiring Diagram for Buick Century 2003:

• A/t shift lock control solenoid (locks shift lever when energized) (in column shift)
• A/t shift lock sol pwr
• Automatic transmission
• Body control module (behind left side of dash, left of steering column)
• Brake to shift relay (left of i/p fuse block)
• Btsi park lock fuse 10a
• Computer data lines system
• Data line
• G113 (lower left front of engine)
• G203 (below dash, right side of steering column)
• Hot in run, bulb test or start
• I/p fuse block (right side of dash, in right door opening)
• Pnk
• Powertrain control module (left front side of engine compt, in air cleaner assembly)
• S106
• S211
• Sig a
• Sig b
• Sig c
• Sig p
• Stoplamp switch (open when brake pedal depressed) (on brake pedal support)
• Transmission internal mode switch

STARTING/CHARGING

Charging Wiring Diagram for Buick Century 2003

List of elements for Charging Wiring Diagram for Buick Century 2003:

• (not used) a
• (not used) c
• A8 c1
• B12
• Battery
• Charge ind
• Cluster fuse 10a
• Computer data lines
• Fusible link (10 ga- rust)
• G100 (right side of engine compt, at base of battery)
• G113 (lower left front of eng, on transaxle stud)
• Gen fuse 10a
• Generator l
• Hot at all times
• Hot in run, or start
• I/p fuse block (behind right side of dash, in right door opening)
• Instrument cluster
• L term monitor c2
• P b+
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Red
• Ser. data class 2 c1
• Solid state
• Splice pack (s205) (behind data link connector)
• Starter
• Underhood fuse block (mounted to right front strut tower)

Starting Wiring Diagram for Buick Century 2003

List of elements for Starting Wiring Diagram for Buick Century 2003:

• Acc
• B red
• Battery
• Bulb test
• Charging circuit (fusible link)
• Crank
• Crank fuse 40a
• Crank relay
• Crank signal bcm, cluster fuse 1oa
• F10
• G100 (right side of engine compartment, at base of battery)
• G113 (lower left front of eng, on transaxle stud, left of starter)
• Hold- in coil
• I/p fuse block (behind right side of dash, in right door opening)
• Ign 1 fuse 30a
• Ignition switch
• Lock
• Nca
• Off
• Pcm bcm ign relay fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of engine compartment, in air cleaner assembly)
• Pull- in coil
• Red
• Run
• S228
• S234
• Start
• Starter
• Starter enable
• Underhood fuse block (mounted to right front strut tower)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram for Buick Century 2003

List of elements for Supplemental Restraints Wiring Diagram for Buick Century 2003:

• (driver seat adjuster wiring harness, 20 cm from c311 breakout) s330
• (inside left door sill, forward of left front seat) g301
• A10
• A11
• A12
• A13
• A14
• A15
• A16
• A17
• A18
• Air bag fuse 10a
• Air bag warning indicator
• B11
• Body control module (bcm) (behind left side of dash, left of steering column)
• Case ground
• Class 2 (bcm) serial data
• Data link connector (dlc) (partial) (under left side of dash, right of steering column)
• G200 (behind right side of i/p compartment)
• Ground
• High control
• Hot in run, bulb test & start
• I/p fuse block (behind right side of dash, in right door opening)
• If equipped
• Ignition
• Ignition voltage
• Inflatable restraint i/p module
• Inflatable restraint sensing & diagnostic module (sdm) (below carpet, under right front seat)
• Inflatable restraint steering wheel module
• Inflatable restraint steering wheel module coil
• Instrument cluster
• Ipc class 2 serial data
• Left front inflatable restraint side impact module
• Left front inflatable restraint side impact sensor (at base of left "b" pillar)
• Logic
• Low control
• Nca
• Powertrain control module (pcm) (left front side of engine compartment, in air cleaner assembly)
• Seat belt switch
• Seat belt switch (part of driver's seat belt assembly)
• Serial data class 2
• Shorting bar
• Signal
• Solid state
• Splice pack sp205 (behind data link connector)
• Voltage

TRANSMISSION

3.1L VIN J

3.1L VIN J, A/T Wiring Diagram for Buick Century 2003

List of elements for 3.1L VIN J, A/T Wiring Diagram for Buick Century 2003:

• (in fuel injector harness)
• (on transaxle right axle case extension) vehicle speed sensor
• 1-2 shift sol
• 2-3 shift sol
• A/t sensor hi
• A/t sensor lo
• Automatic transaxle
• Automatic transaxle fluid pressure manual valve position switch
• Automatic transaxle fluid temperature sensor
• Automatic transaxle input shaft speed sensor
• Automatic transmission
• B12
• Battery in
• Bcm & instrument cluster
• Body control module & instrument cluster
• Brake switch in
• Cluster fuse 10a
• Data link connector (below dash, right side of steering column)
• Ecm fuse 22 10a
• Ect return
• Ect sensor in
• Eng emis fuse 30 10a
• Engine controls system
• Engine coolant temperature sensor (top left side of engine)
• G113 (lower left front of engine on transaxle stud)
• G113 (lower left front of engine, on transaxle stud)
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• Hot in run, bulb test or start
• I/p fuse block (behind right side of dash)
• Ign 0 fuse 10a
• Ignition (0) in
• Ignition (1) in
• Instrument panel cluster (ipc)
• Map sensor
• Mil ctrl
• Pc sol hi
• Pc sol lo
• Pcm ground
• Pcm-bcm ign relay fuse 10a
• Pnk
• Powertrain control module (left side of engine compt, in air cleaner assembly)
• Pressure control sol
• Red
• S105
• S121
• S270
• Serial data
• Service engine soon
• Splice pack sp205 (near dlc)
• Stop lamp switch (on brake pedal support bracket)
• Tan
• Tcc pwm sol
• Tcc release
• Tcc release in
• Tcc/ brake switch
• Tft sensor gnd
• Tft sensor in
• Throttle position sensor (on throttle body)
• Tp 5v ref
• Tp sensor in
• Tps return
• Tr sw in-a
• Tr sw in-b
• Tr sw in-c
• Tr sw in-p
• Trans fuse 26 10a
• Transmission internal mode switch
• Underhood fuse block (mounted to right front strut tower)
• Vss hi (signal)
• Vss lo (ground)

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Buick Century 2003

List of elements for Trunk Release Wiring Diagram for Buick Century 2003:

• (left of steering column) body control module
• Class 2 ser data
• Computer data lines system
• Door locks fuse 20a
• G203 (below dash, right side of steering column)
• G402 (right side of rear shelf)
• Hot at all times
• I/p fuse block (behind right side of dash, in right door opening)
• Instrument panel cluster
• Interior lights system
• Keyless ser data
• Rear compartment lid lock release actuator (near rear compartment lid latch)
• Rear compartment lid release relay (behind glove box, mounted to under- side of cross-car beam)
• Rear compartment lid release switch
• Release rly ctrl
• Remote control door lock receiver (behind nstrument cluster)
• S211
• S269
• S905
• Tk ajar sw sig
• Tk release sw sig
• Trunk open ind

WARNING SYSTEMS

Warning Systems Wiring Diagram for Buick Century 2003

List of elements for Warning Systems Wiring Diagram for Buick Century 2003:

• door ajar sw sig
• (below dash, right side of steering column) g203
• (close w/key in ignition)
• (i/p wiring harness, 7 cm from data link connector breakout, toward c201)
• (i/p wiring harness, midway between headlamp switch breakout & back-up lamp relay breakout)
• (inside left door sill, forward of left front seat) g301
• A10
• A11
• Accessory voltage
• Ajar
• B10
• B11
• Bcm acc fuse 10a
• Body control module (bcm) (behind left side of dash, left of steering column)
• Chime
• Class 2 serial data
• Computer data lines system
• Crank signal, bcm clstr fuse 10a
• Crank voltage
• Door unlatch sw sig
• Driver door lock
• Driver seat belt switch (part of driver's seat belt assembly)
• Exterior lps off input
• G201 (below dash, left side of steering column)
• G203 (below dash, right side of steering column)
• Ground
• Head
• Headlamp switch
• Hot at all times
• Hot in acc & run
• Hot in run & start
• Hot in start
• Hot in unlock run & start
• I/p fuse block (behind right side of dash, in right door opening)
• Ign o, cluster, pcm & bcm fuse 10a
• Ignition 0 voltage
• Ignition 1 voltage
• Ignition switch (key in ignition switch)
• Instrument panel cluster (ipc)
• Interior lights system
• Key in ign sw sig
• Latched
• Left seat belt switch
• Left turn
• Left turn signal
• Low tire press sw sig
• Lp park fuse 34 20a
• Nca
• Off
• Park
• Park brake on signal
• Park brake switch (on parking brake assembly)
• Pcm, bcm u/h relay fuse 10a
• Pnk
• Power distribution system
• Powertrain control module (pcm) (left front side of engine compartment, in air cleaner assembly)
• Right turn
• Right turn signal
• S211
• S234
• S270
• S283
• S291
• S292
• S322
• S330
• S504
• Splice pack sp205 (below dash, right side of steering column, behind data link connector)
• Tan
• Tire reset switch (in i/p fuse block)
• Un- latched
• Underhood fuse block (mounted to right front strut tower)

WIPER/WASHER

Wiper/Washer Wiring Diagram for Buick Century 2003

List of elements for Wiper/Washer Wiring Diagram for Buick Century 2003:

• (behind right side of dash) g200
• (below dash, left side of steering column) g201
• Delay
• Hot in accy or run
• I/p fuse block (behind right side of dash, in right door opening)
• Instrument panel cluster
• Mist
• Nca
• Off
• Red
• S230
• S249
• Washer switch
• Wind- shield washer fluid level switch (in washer fluid reservoir)
• Windshield washer fluid pump (in washer fluid reservoir)
• Windshield wiper motor (on left side of firewall, below air inlet screen)
• Windshield wiper switch
• Wiper fuse 25a
• Wiper motor
• Wiper motor controller
• Wiper switch