Buick Riviera 1999 - 1999 GENERAL MOTORS Aurora & Riviera

Buick Riviera 1999 - BUZZERS, RELAYS & TIMERS

Buick Riviera 1999 BUZZERS, RELAYS & TIMERS

Component	Component Location
A/C Compressor Relay	In engine compartment power distribution center.
ABS Main Relay	At center rear of engine compartment.
ABS Pump Relay	At center rear of engine compartment.
Automatic Level Control Relay	In relay center.
Cooling Fan Relay (High Speed)	In engine compartment power distribution center.
Cooling Fan Relay (Low Speed) (3.8L VIN 1)	At center rear of engine compartment. See Fig. 1 .
Cooling Fan Relay (Low Speed) (4.0L VIN C)	At center rear of engine compartment. See Fig. 2 .
Cooling Fan Relay (Series/Parallel)	In engine compartment power distribution center.
Fog Lamp Relay	In engine compartment power distribution center.
Fuel Pump Relay	In relay center.
Horn Relay	In engine compartment power distribution center.
Left Front Door Unlock Relay	In rear relay center.
Perimeter Lighting Control Relay	Under left side of rear seat.
Power Antenna Relay	On right side of rear compartment.
Rear Compartment Lid Release Relay	In relay center.
Rear Defog Relay (2) (No. 1 & No. 2)	In relay center.
Retained Accessory Power (RAP) Accessory Relay	In relay center.
Starter Enable Relay	Behind dash, left of steering column.

Buick Riviera 1999 - CIRCUIT PROTECTION DEVICES

Buick Riviera 1999 CIRCUIT PROTECTION DEVICES

Component	Component Location
Dash Fuse Block (3.8L VIN 1)	At left side of passenger compartment, attached to door hinge pillar. See Fig. 1 .
Dash Fuse Block (4.0L VIN C)	At left side of passenger compartment, attached to door hinge pillar. See Fig. 2 .
Diode, A/C Compressor Clutch	Near A/C compressor, taped to harness.
Diode, Anti-Lock	On left side of engine compartment, taped to harness.
Diode, Primary Cooling Fan	Near secondary cooling fan, taped to harness.
Engine Compartment Power Distribution Center (3.8L VIN 1)	At right front corner of engine compartment. See Fig. 1 .
Engine Compartment Power Distribution Center (4.0L VIN C)	At right front corner of engine compartment. See Fig. 2 .
Fuse Block (Rear) (Aurora)	Under rear seat, near battery. See Fig. 2 .
Relay Center (Rear) (Aurora)	Under rear seat, near battery. See Fig. 2 .
Steering Column Fuse Holder	At base of steering column.

Buick Riviera 1999 - CONTROL UNITS

Buick Riviera 1999 CONTROL UNITS

Component	Component Location
Blower Control Module	Behind right side of dash, near blower motor.
Body Control Module (MALL)	Below left side of dash, on lamp control module (LCM) bracket.
Bose Amplifier	Under rear package shelf.
Cruise Control Module (3.8L VIN 1)	On center of firewall. See Fig. 1 .
Cruise Control Module (4.0L VIN C)	On center of firewall. See Fig. 2 .
Dimmer Module (2)	Behind dash, on steering column support.
Electronic Brake (& Traction) Control Module (EBCM/EBTCM)	Attached to left strut tower.
Express Down Window Module	In center of left front door.
Fuel Pump Control Module	On left side of luggage compartment.
Heated Seat Module (2)	On underside of respective front seat.
HVAC Programmer	Behind right side of dash.
Ignition Control Module (ICM) (3.8L VIN 1)	On right side top of engine, under ignition coils. See Fig. 1 .
Ignition Control Module (ICM) (4.0L VIN C)	On right side top of engine, under ignition coils. See Fig. 2 .
Lamp Control Module (LCM)	Behind left side of dash.
Lumbar Seat Module (Aurora)	On underside of left front seat.
Magna Steering Module	Under dash, on bracket left of steering column.
Memory Seat/Mirror Module	Under left front seat.
Pass Key II Theft Deterrent Module	Behind right side of dash.
Powertrain Control Module (PCM) (3.8L VIN 1)	Behind right side of dash. See Fig. 1 .
Powertrain Control Module (PCM) (4.0L VIN C)	Behind right side of dash. See Fig. 2 .
Remote Function Actuator (RFA) Module	Under rear package shelf.
Sensing & Diagnostic Module (SDM)	Below right front seat, under carpet.
Sun Roof Control Module	On rear underside of roof.
Wiper/Washer Motor Module	On center of firewall.

Buick Riviera 1999 - MOTORS

Buick Riviera 1999 MOTORS

Component	Component Location
Automatic Level Control Compressor	Below right rear of vehicle.
Blower Motor	Behind right side of dash.
Cooling Fan Motor, Primary (Aurora)	Behind left side of radiator. See Fig. 2 .
Cooling Fan Motor, Secondary (Aurora)	Behind right side of radiator. See Fig. 2 .
Door Lock Actuator (4)	In respective door.
Forward/Back Motor (Aurora)	Underside of respective front seat.
Height Motor, Front	Underside of respective front seat, on seat adjuster frame.
Height Motor, Rear	Underside of respective front seat, on seat adjuster frame.
Magna Steer Actuator	Lower right rear of engine compartment, inside steering gear.
Power Antenna Motor	On right side of rear compartment.
Recline Motor	Underside of respective front seat, on seat adjuster frame.
Starter Motor (Riviera)	On lower left side of engine.
Starter Motor (Aurora)	On top of engine, below intake manifold. See Fig. 2 .
Sun Roof Motor Assembly	On rear underside of roof.
Trunk Lid Actuator	On underside of rear compartment lid.
Window Motor (4)	In respective door.
Windshield Washer Pump	On washer fluid reservoir, right rear of engine compartment.
Windshield Wiper Motor	On right side of firewall.

Buick Riviera 1999 - SENDING UNITS & SENSORS

Buick Riviera 1999 SENDING UNITS & SENSORS

Component	Component Location
A/C High Temperature Sensor (Aurora)	On right side of engine compartment. See Fig. 2 .
A/C Low Temperature Sensor (Aurora)	On right rear of engine compartment. See Fig. 2 .
A/C Pressure Sensor (Riviera)	On left rear of engine compartment. See Fig. 1 .
Ambient Air Temperature Sensor	Mounted to center brace, left front of vehicle.
Ambient Light Sensor	On top center of dash.
Automatic Level Control Height Sensor	Below right rear of vehicle.
Battery Thermistor	Under rear seat, attached to positive battery cable.
Camshaft Position (CMP) Sensor (3.8L VIN 1)	On front of engine. See Fig. 1 .
Camshaft Position (CMP) Sensor (4.0L VIN C)	On front of engine. See Fig. 2 .
Crankshaft Position (CKP) Sensor (3.8L VIN 1)	On front of engine, next to crankshaft balancer. See Fig. 1 .
Crankshaft Position (CKP) Sensor, A & B (2) (4.0L VIN C)	On lower left side of engine between cylinders 4 & 6. See Fig. 2 .
Engine Coolant Temperature (ECT) Sensor (3.8L VIN 1)	On left rear of engine, under thermostat housing. See Fig. 1 .
Engine Coolant Temperature (ECT) Sensor (4.0L VIN C)	On top left rear of engine, on intake manifold. See Fig. 2 .
Engine Oil Pressure Sensor (Aurora)	On lower left side of engine.
Forward/Back Position Sensor (Aurora)	Underside of respective front seat, on seat adjuster frame.
Front End Discriminating Sensor	On center front of engine compartment, on radiator support.
Fuel Level Sender	In fuel tank.
Heated Oxygen Sensor 1 (HO2S 1) (3.8L VIN 1)	On right side exhaust manifold. See Fig. 1 .
Heated Oxygen Sensor 2 (HO2S 2) (3.8L VIN 1)	On exhaust system, rear of catalytic converter.
Heated Oxygen Sensor (HO2S) (Front) (4.0L VIN C)	On left side exhaust manifold. See Fig. 2 .
Heated Oxygen Sensor (HO2S) (Post-Converter) (4.0L VIN C)	On exhaust system, after catalytic converter. See Fig. 2 .
Heated Oxygen Sensor (HO2S) (Pre-Converter) (4.0L VIN C)	On exhaust system, before catalytic converter. See Fig. 2 .
Heated Oxygen Sensor (HO2S) (Rear) (4.0L VIN C)	On right side exhaust manifold. See Fig. 2 .
Height Position Sensor, Front	Underside of respective front seat, on seat adjuster frame.
Height Position Sensor, Rear	Underside of respective front seat, on seat adjuster frame.
Intake Air Temperature (IAT) Sensor (3.8L VIN 1)	In air intake assembly. See Fig. 1 .
Intake Air Temperature (IAT) Sensor (4.0L VIN C)	In air intake assembly. See Fig. 2 .
In-Vehicle Temperature Sensor	In dash, right of steering column.
Knock Sensor (KS) (Bank 1) (3.8L VIN 1)	On engine, under left exhaust manifold. See Fig. 1 .
Knock Sensor (KS) (Bank 2) (3.8L VIN 1)	On engine, under right exhaust manifold. See Fig. 1 .
Knock Sensor (KS) (4.0L VIN C)	On top of engine, under intake manifold. See Fig. 2 .
Manifold Absolute Pressure (MAP) Sensor (3.8L VIN 1)	On top right side of engine. See Fig. 1 .
Manifold Absolute Pressure (MAP) Sensor (4.0L VIN C)	At top right side of engine. See Fig. 2 .
Mass Air Flow (MAF) Sensor (3.8L VIN 1)	At rear of engine, in intake duct. See Fig. 1 .
Mass Air Flow (MAF) Sensor (4.0L VIN C)	At rear of engine, in intake duct. See Fig. 2 .
Solar Sensor (2)	On respective sides of dash.
Throttle Position (TP) Sensor (3.8L VIN 1)	On throttle body. See Fig. 1 .
Throttle Position (TP) Sensor (4.0L VIN C)	On throttle body. See Fig. 2 .
Vehicle Speed Sensor (VSS) (3.8L VIN 1)	In lower right rear of engine compartment, on transaxle. See Fig. 1 .
Vehicle Speed Sensor (VSS) (4.0L VIN C)	In lower right rear of engine compartment, on transaxle. See Fig. 2 .
Wheel Speed Sensors (4)	On respective brake assemblies, on wheel spindle.

Buick Riviera 1999 - SOLENOIDS & SOLENOID VALVES

Buick Riviera 1999 SOLENOIDS & SOLENOID VALVES

Component	Component Location
Boost Control Solenoid	On left side of engine, near oil fill.
Brake Pressure Modulator Valve	On left front of engine compartment.
Evaporative Emissions (EVAP) Purge Solenoid Valve (3.8L VIN 1)	On top right rear of engine. See Fig. 1 .
Evaporative Emissions (EVAP) Purge Solenoid Valve (4.0L VIN C)	On right side rear of engine. See Fig. 2 .
Evaporative Emissions (EVAP) Vent Valve	Below rear of vehicle, inside EVAP canister.
Exhaust Gas Recirculation (EGR) Valve (3.8L VIN 1)	On top right rear of engine. See Fig. 1 .
Exhaust Gas Recirculation (EGR) Valve (4.0L VIN C)	On top right rear of engine. See Fig. 2 .
Fuel Door Release Solenoid	In left quarter panel, at fuel door.
Idle Air Control (IAC) Valve (3.8L VIN 1)	On rear of engine, in throttle body. See Fig. 1 .
Idle Air Control (IAC) Valve (4.0L VIN C)	On rear of engine, in throttle body. See Fig. 2 .
Seat Belt Retractor Solenoid (2)	In respective front seat belt retractor.
Shift Interlock Solenoid (Column)	On lower left side of steering column.
Shift Interlock Solenoid (Console)	On base of shifter, below console.

Buick Riviera 1999 - SWITCHES

Buick Riviera 1999 SWITCHES

Component	Component Location
A/C High Pressure Cut-Off Switch (Aurora)	On right front of engine compartment. See Fig. 2 .
A/C Low Pressure Cut-Off Switch (Aurora)	On right side of engine compartment. See Fig. 2 .
ABS/TCC Switch	Behind dash, on brake pedal support.
Brake Fluid Level Switch	On master cylinder reservoir.
Engine Coolant Level Switch (Aurora)	On right front of engine compartment, in coolant surge tank.
Engine Coolant Level Switch (Riviera)	On right front of engine compartment, mounted in top of radiator.
Engine Oil Level Switch (3.8L VIN 1)	On lower left side of engine. See Fig. 1 .
Engine Oil Pressure Switch (3.8L VIN 1)	On lower left side of engine.
Evaporative Emissions (EVAP) Purge Vacuum Switch (3.8L VIN 1)	On right side of engine. See Fig. 1 .
Evaporative Emissions (EVAP) Purge Vacuum Switch (4.0L VIN C)	On left side of engine, near fuel rail.
Park Brake Switch	On top of park brake assembly.
Power Steering Pressure (PSP) Switch (Aurora)	In power steering pressure line, right side of engine compartment. See Fig. 2 .
Seat Belt Switch	In left front seat buckle assembly.
Stoplamp/BTSI Switch	Behind dash, on brake pedal support.
Transaxle Range Switch/Park Neutral Position (PNP) Switch (3.8L VIN 1)	On transaxle, left side of engine compartment. See Fig. 1 .
Windshield Washer Fluid Level Switch	On washer fluid reservoir, right rear of engine compartment.

Buick Riviera 1999 - MISCELLANEOUS

Buick Riviera 1999 MISCELLANEOUS

Component	Component Location
Compact Disc (CD) Changer	Right side of luggage compartment.
Data Link Connector (DLC) (3.8L VIN 1)	Under left side of dash. See Fig. 1 .
Data Link Connector (DLC) (4.0L VIN C)	Under left side of dash. See Fig. 2 .
Daytime Running Lamps Resistor (Aurora)	In right front corner of engine compartment.
Flasher, Hazard	Behind dash, right side of steering column.
Flasher, Turn	Behind dash, left side of steering column.
Fuel Injectors (6) (3.8L VIN 1)	On top of engine, at respective intake port. See Fig. 1 .
Fuel Injectors (8) (4.0L VIN C)	On top of engine, at respective intake port. See Fig. 2 .
Memory Seat/Mirror Diagnostic Connector	Under left front seat, taped to harness.

Buick Riviera 1999 - CONNECTORS

Buick Riviera 1999 CONNECTORS

Component	Component Location
C100 (Gray, 20 Pin)	Body harness to transmission harness, left front of engine
C101 (Black, 78 Pin)	Body harness to engine harness, center rear of engine compartment.
C102 (Black, 30 Pin)	Body harness to body harness, center rear of engine compartment.
C103 (Gray, 2 Pin)	Body harness to right front wheel speed sensor harness, right rear of engine compartment.
C104 (Gray, 2 Pin)	Body harness to left front wheel speed sensor harness, left rear of engine compartment.
C105 (Black, 5 Pin)	Body harness to windshield washer harness, right front of engine compartment.
C106 (20 Pin)	Engine harness to fuel rail harness, right front side of engine.
C107 (Black, 8 Pin)	Engine harness to ignition harness, right front side of engine, near ignition coil.
C111 (1 Pin)	Engine harness to knock sensor harness, right rear of engine, below power steering pump.
C114 (Black, 7 Pin)	Body harness to park/neutral switch harness, left center of engine compartment.
C131 (Black/Gray, 2 Pin)	Engine harness to starter harness, under left side of dash.
C202 (Gray/Black, 48 Pin)	Body harness to steering column harness, under left side of instrument panel.
C203 (Oldsmobile) (Black, 16 Pin)	Instrument panel harness to console harness, under center console.
C203 (Buick) (Black, 8 Pin)	Instrument panel harness to console harness, under center console.
C205 (Black, 2 Pin)	Body harness, under right side of dash, near blower motor.
C206 (Black, 4 Pin)	Under center console.
C207 (Black, 16 Pin)	Body harness to HVAC harness, under right side of dash.
C208 (Gray, 6 Pin)	Under left side of dash.
C209 (Black, 4 Pin)	Under left side of dash.
C212 (Blue, 10 Pin)	Instrument panel harness to audio harness, under left side of dash.
C213 (6 Pin)	Instrument panel harness to audio harness, under left side of dash.
C215 (Natural, 8 Pin)	Instrument panel harness to audio harness, under left side of dash.
C219 (Black/Natural, 8 Pin)	Instrument panel harness to defroster grille harness, under left side of defroster grille
C301 (Black, 23 Pin)	Body harness to left seat harness, under left front seat
C303 (Natural, 10 Pin)	Body harness to headliner harness, right side rear of passenger compartment.
C305 (Black, 23 Pin)	Body harness to right seat harness, under right side front seat.
C306 (2 Pin)	Left front side of passenger compartment, under left front seat.
C307 (Black, 2 Pin)	Right front side of passenger compartment, under right front seat.
C308 (Black, 3 Pin)	Body harness to sun roof harness, right rear of vehicle.
C400 (Black, 16 Pin)	Instrument panel harness to audio harness, left rear of passenger compartment.
C401 (Gray, 4 Pin)	Body harness to rear wheel speed sensor harness, under center rear of vehicle.
C404 (Gray, 6 Pin)	Body harness to license lamp harness, right rear of vehicle.
C405 (Black, 4 Pin)	Body harness to right taillamp harness, right rear of vehicle.
C406 (Black, 4 Pin)	Body harness to left taillamp harness, left rear of vehicle.
C407 (Gray, 6 Pin)	Body harness to taillamp harness, right rear of rear compartment.
C501 (Buick) (Natural, 10 Pin)	Body harness to door trim harness, in left front door.
C501 (Oldsmobile) (Black, 16 Pin)	Body harness to door trim harness, in left front door.
C600 (Natural, 10 Pin)	Body harness to door trim harness, in right front door.
C601 (Black, 16 Pin)	Body harness to door trim harness, in right front door.

Buick Riviera 1999 - GROUNDS

Buick Riviera 1999 GROUNDS

Component	Component Location
G100	On right front of engine, under ignition control module bracket.
G101	On right rear of engine, near right axle shaft.
G102 (3.8L VIN 1)	On center front of engine, near started motor.
G102 (4.0L VIN C)	On right front of engine, on cylinder head.
G103	On right of engine compartment, on lower rail, near upper engine mount.
G104	On left of engine compartment, on lower rail, near strut tower.
G106	On left of engine compartment, on lower rail, near electronic brake & traction control module.
G110	On right of engine compartment, on lower rail, near upper engine mount.
G201	In right front of passenger compartment, under kick panel trim plate.
G202	On left front of passenger compartment, under kick panel trim plate.
G301	On right rear of passenger compartment, under rear seat cushion.
G302	On left rear of passenger compartment, under rear seat cushion.
G306	On right rear of passenger compartment, under right front seat.
G401	On right of rear compartment, on edge of wheelhouse.

Buick Riviera 1999 - SPLICES

Buick Riviera 1999 SPLICES

Component	Component Location
S100	In body harness, 26 cm from C105.
S101	In body harness, 26.5 cm from intake air temperature sensor.
S102	In body harness, 17.5 cm from brake fluid level sensor.
S104	In body harness, 69.5 cm from engine coolant level switch.
S105	In engine harness, 18.5 cm from A/C compressor clutch.
S106	In engine harness, 18 cm from fuel injector No. 4.
S115	In body harness, 32 cm from C105.
S116	In body harness, 13.5 cm from right rear of engine compartment, near base of strut tower.
S118	In engine harness, 18.5 cm from C101.
S121	In body harness, 35 cm from G103.
S129	In engine harness, 19 cm from fuel injector No. 6.
S130	In body harness, 38 cm from right rear of engine compartment, near base of strut tower.
S131	In engine harness, 34 cm from C101.
S150	In fuel injector harness, 26.5 cm from C106.
S151	In fuel injector harness, 20 cm from C106.
S152	In engine harness, 31.5 cm from C101.
S153	In engine harness, 33 cm from C106.
S155	In engine harness, 19 cm from fuel injector No. 4.
S160	In engine harness, 25.5 cm from fuel injector No. 5.
S204	In instrument panel harness, 23.5 cm from C200.
S206	In body harness, 28.5 cm from turn signal flasher.
S207	In instrument panel harness, 75 cm from C200.
S209	In body harness, 37.5 cm from turn signal flasher.
S211	In body harness, 35.5 cm from turn signal flasher.
S212	In body harness, 7 cm from front of right front door jamb.
S215	In instrument panel harness, 37.5 cm from C200.
S221	In body harness, 29.5 cm from left rear of engine compartment, near base of strut tower.
S222	In body harness, 32.5 cm from left rear of engine compartment, near base of strut tower.
S223	In body harness, 28.5 cm from left rear of engine compartment, near base of strut tower.
S224	In body harness, 21.5 cm from left rear of engine compartment, near base of strut tower.
S225	In body harness, 24.5 cm from G201.
S232	In audio harness, 34.5 cm from radio amplifier.
S236	In instrument panel harness, 30 cm from C200.
S237	In body harness, 24 cm from park brake switch.
S241	In body harness, 82.5 cm from powertrain control module.
S246	In instrument panel harness, 23.5 cm from C200.
S248	In body harness, 43.5 cm from powertrain control module.
S258	In body harness, 32 cm from park brake switch.
S259	In body harness, 160.5 cm from powertrain control module.
S263	In body harness, 28 cm from park brake switch.
S264	In instrument panel harness, 56.5 cm from radio.
S273	In instrument panel harness, 68 cm from C203.
S274	In HVAC harness, 51 cm from C207 breakout.
S276	In HVAC harness, 51 cm from C207 breakout.
S277	In HVAC harness, 51 cm from C207 breakout.
S279	In instrument panel harness, 17.5 cm from C219.
S290	In body harness, 73 cm from left rear of engine compartment, near base of strut tower.
S302	In console harness, 22 cm from C300.
S303	In body harness, 90.5 cm from front of right side rear door jamb.
S304	In left seat harness, near C301.
S306	In left seat harness, near C301.
S309	In body harness, 19 cm from G302.
S310	In left seat harness, near C301.
S314	In console harness, 22 cm from C300.
S316	In console harness, 22 cm from C300.
S319	In headliner harness, 230 cm from C303.
S335	In body harness, 79 cm from G302.
S337	In body harness, 65.5 cm from G302.
S338	In body harness, 51.5 cm from G302.
S339	In body harness, 45 cm from G302.
S341	In body harness, 49 cm from G302.
S347	In body harness, 25.5 cm from G302.
S348	In body harness, 21.5 cm from G302.
S352	In body harness, 38.5 cm from G302.
S358	In body harness, 119.5 cm from front of right rear door jamb.
S364	In body harness, 136 cm from front of right rear door jamb.
S365	In body harness, 126 cm from front of right rear door jamb.
S366	In body harness, 111 cm from front of right rear door jamb.
C410	In body harness, 33 cm from G401.
S416	In taillamp harness, near right rear of vehicle, near taillamp assembly.
S417	In body harness, 93.5 cm from front of right rear door jamb.
S418	In body harness, 92 cm from front of right rear door jamb.
S419	In body harness, 34 cm from C404.
S420	In taillamp harness, near right rear of vehicle, near taillamp assembly.
S421	In taillamp harness, near right rear of vehicle, near taillamp assembly.
S425	In taillamp harness, near center rear of vehicle, near license plate.
S426	In taillamp harness, near left rear of vehicle, near taillamp assembly.
S429	In taillamp harness, near right rear of vehicle, near taillamp assembly.
S437	In taillamp harness, near left rear of vehicle, near taillamp assembly.
S451	In body harness, 92 cm from front of right rear door jamb.
S506	In left door harness, near C500.
S607	In right door harness, near right courtesy lamp.