Wiring Diagram Cluster

1991 Buick Riviera Body Electrical Wiring Diagram

Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.

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Matched Diagrams

48

Variant Used

Riviera V6-231 3.8L VIN L SFI

Total Vehicle Diagrams

747

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1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )

OEM source

Factory Manual Evidence

When there is no clean repair shortcut for this system, drop into the OEM manual sections that usually carry the authoritative test path.

1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC ) →
1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )

Diagnostic signal

Codes Often Seen With This System

Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.

B1318: Battery Voltage Low →
U0140: Lost Communication with Body Control Module

Top Body Electrical Diagram Paths

1.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Pull-to-Seat ConnectorsBody and FrameOpen2.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Push-to-Seat ConnectorsBody and FrameOpen3.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Cell ReferencesBody and FrameOpen4.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Schematic SymbolsBody and FrameOpen5.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen6.Doors, Hood and Trunk > Trunk / Liftgate — Electrical Diagrams > Trunk Lid Pull-DownBody and FrameOpen7.Doors, Hood and Trunk > Trunk / Liftgate — Electrical Diagrams > Trunk Lid ReleaseBody and FrameOpen8.Horn — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen9.Horn — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen10.Horn — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen11.Horn — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen12.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen13.Horn — Electrical DiagramsLighting and HornsOpen14.Locks > Power Locks — Electrical Diagrams > With Keyless EntryBody and FrameOpen15.Locks > Power Locks — Electrical Diagrams > Without Keyless EntryBody and FrameOpen16.Trunk Lamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen17.Trunk Lamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen18.Trunk Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen19.Trunk Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen20.Trunk Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen21.Trunk Lamp — Electrical DiagramsLighting and HornsOpen22.Components > Miscellaneous Components > Horn Brush/Slip RingGeneralOpen23.Components > Modules > Body Computer ModuleGeneralOpen24.Components > Modules > Keyless Entry ModuleGeneralOpen25.Components > Motors > Door Lock MotorGeneralOpen26.Components > Motors > Power Door Lock MotorGeneralOpen27.Components > Relays > Door Lock RelayGeneralOpen28.Components > Relays > Tonneau Top/Trunk Lid Ajar RelayGeneralOpen29.Components > Solenoids > Trunk Lid Release SolenoidGeneralOpen30.Components > Switches > Door Lock Cylinder SwitchGeneralOpen31.Components > Switches > Horn SwitchGeneralOpen32.Components > Switches > Trunk Lid Key Cylinder SwitchGeneralOpen33.Components > Switches > Trunk Lid Tamper SwitchGeneralOpen34.Components > Switches > Trunk Light SwitchGeneralOpen35.Connector Views > Body Control ModuleGeneralOpen36.Electrical Diagrams > Body Control Module (BCM) > Part 1 of 4Powertrain ManagementOpen37.Electrical Diagrams > Body Control Module (BCM) > Part 2 of 4Powertrain ManagementOpen38.Electrical Diagrams > Body Control Module (BCM) > Part 3 of 4Powertrain ManagementOpen39.Electrical Diagrams > Body Control Module (BCM) > Part 4 of 4Powertrain ManagementOpen40.Electrical Diagrams > HornGeneralOpen41.Electrical Diagrams > Power Locks > With Keyless EntryGeneralOpen42.Electrical Diagrams > Power Locks > Without Keyless EntryGeneralOpen43.Electrical Diagrams > Powertrain Management > System Diagram > Body Control Module (BCM) > Part 1 of 4GeneralOpen44.Electrical Diagrams > Powertrain Management > System Diagram > Body Control Module (BCM) > Part 2 of 4GeneralOpen45.Electrical Diagrams > Powertrain Management > System Diagram > Body Control Module (BCM) > Part 3 of 4GeneralOpen46.Electrical Diagrams > Powertrain Management > System Diagram > Body Control Module (BCM) > Part 4 of 4GeneralOpen47.Electrical Diagrams > Trunk / Liftgate > Trunk Lid Pull-DownGeneralOpen48.Electrical Diagrams > Trunk / Liftgate > Trunk Lid ReleaseGeneralOpen

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OEM Manual Evidence

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1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Riviera V6-231 3.8L VIN L SFI Service Manual | Operation CHARM Operation CHARM : Car re...

1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Roadmaster V8-305 5.0L Service Manual | Operation CHARM Operation CHARM : Car repair ma...

1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Skylark L4-151 2.5L Service Manual | Operation CHARM Operation CHARM : Car repair manua...

1991 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1991 Buick Reatta V6-231 3.8L VIN L SFI Service Manual | Operation CHARM Operation CHARM : Car rep...

Likely Trouble Codes for This System

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B1318: Battery Voltage LowCode

Body/Electrical code commonly seen during body electrical diagnosis.

U0140: Lost Communication with Body Control ModuleCode

Network/Communication code commonly seen during body electrical diagnosis.

More Riviera Wiring Pages

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