Wiring Diagram Cluster

1993 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

1976

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1993 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.

1993 Buick Riviera A L L Diagnostic Trouble Codes ( DTC ) →
1993 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )1993 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.Courtesy Lamp — Electrical Diagrams > Interior Lights With Illuminated Entry > Rear Quarter Reading/Courtesy Lights (C69)/Trunk and Glove BoxLighting and HornsOpen2.Electrical Diagrams > Courtesy Lamp > System Diagram > Interior Lights With Illuminated Entry > Rear Quarter Reading/Courtesy Lights (C69)/Trunk and Glove BoxGeneralOpen3.Courtesy Lamp — Electrical Diagrams > Interior Lights With Illuminated Entry > Courtesy LightsLighting and HornsOpen4.Courtesy Lamp — Electrical Diagrams > Interior Lights With Illuminated Entry > Vanity Mirrors and Overhead Reading/Courtesy LightsLighting and HornsOpen5.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Malfunctions > GeneralBody and FrameOpen6.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Grounded CircuitBody and FrameOpen7.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Intermittents and Poor ConnectionsBody and FrameOpen8.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Open CircuitBody and FrameOpen9.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Short CircuitBody and FrameOpen10.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Circuit Protection DevicesBody and FrameOpen11.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Basic Troubleshooting GuideBody and FrameOpen12.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Checking Terminal ContactBody and FrameOpen13.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Intermittents and Poor ConnectionsBody and FrameOpen14.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Troubleshooting TestsBody and FrameOpen15.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Troubleshooting ToolsBody and FrameOpen16.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Handling and Measuring ProceduresBody and FrameOpen17.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Tech Tips > Typical Electrical RepairBody and FrameOpen18.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Circuit Protection DevicesBody and FrameOpen19.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Pull-to-Seat ConnectorsBody and FrameOpen20.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Push-to-Seat ConnectorsBody and FrameOpen21.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Splicing Copper Wire Using Crimp and Seal Splice SleevesBody and FrameOpen22.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Splicing Copper Wire Using Splice ClipsBody and FrameOpen23.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Splicing Twisted/Shielded CableBody and FrameOpen24.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Typical Electrical RepairBody and FrameOpen25.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Wire Repair Procedures > Weather Pack ConnectorsBody and FrameOpen26.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Basic Circuit Operation > ElectricityBody and FrameOpen27.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Basic Circuit Operation > Parallel CircuitBody and FrameOpen28.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Basic Circuit Operation > Series CircuitBody and FrameOpen29.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Basic Circuit Operation > Series/Parallel CircuitBody and FrameOpen30.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Cell ReferencesBody and FrameOpen31.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Circuit Protection DevicesBody and FrameOpen32.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Electrical Controls > Circuit ComponentsBody and FrameOpen33.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Electrical Controls > DiodesBody and FrameOpen34.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Electrical Controls > RelaysBody and FrameOpen35.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Symbol IdentificationBody and FrameOpen36.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen37.Doors, Hood and Trunk > Trunk / Liftgate — Electrical Diagrams > Trunk Lid Pull-DownBody and FrameOpen38.Doors, Hood and Trunk > Trunk / Liftgate — Electrical Diagrams > Trunk Lid ReleaseBody and FrameOpen39.Horn — Diagnostic Aids > Tech Tips > Circuit Malfunctions > GeneralLighting and HornsOpen40.Horn — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Grounded CircuitLighting and HornsOpen41.Horn — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Intermittents and Poor ConnectionsLighting and HornsOpen42.Horn — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Open CircuitLighting and HornsOpen43.Horn — Diagnostic Aids > Tech Tips > Circuit Malfunctions > Short CircuitLighting and HornsOpen44.Horn — Diagnostic Aids > Tech Tips > Circuit Protection DevicesLighting and HornsOpen45.Horn — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Basic Troubleshooting GuideLighting and HornsOpen46.Horn — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Checking Terminal ContactLighting and HornsOpen47.Horn — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Intermittents and Poor ConnectionsLighting and HornsOpen48.Horn — Diagnostic Aids > Tech Tips > General Troubleshooting Procedures > Troubleshooting TestsLighting and HornsOpen

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OEM Manual Evidence

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1993 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1993 Buick Riviera V6-231 3.8L VIN L SFI Service Manual | Operation CHARM Operation CHARM : Car re...

1993 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1993 Buick Century V6-204 3.3L VIN N FI Service Manual | Operation CHARM Operation CHARM : Car rep...

1993 Buick Riviera A L L Diagnostic Trouble Codes ( DTC )OEM Manual

A L L Diagnostic Trouble Codes ( DTC ) — 1993 Buick Skylark V6-204 3.3L VIN N FI 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.

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