Wiring Diagram Cluster

1991 Buick Skylark 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

Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4

Total Vehicle Diagrams

461

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1991 Buick Skylark 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 Skylark A L L Diagnostic Trouble Codes ( DTC ) →
1991 Buick Skylark A L L Diagnostic Trouble Codes ( DTC )1991 Buick Skylark A L L Diagnostic Trouble Codes ( DTC )1991 Buick Skylark 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 > Doors — DiagramBody and FrameOpen2.Doors, Hood and Trunk > Doors > Front Door — DiagramBody and FrameOpen3.Horn — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen4.Horn — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen5.Horn — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen6.Horn — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen7.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen8.Horn — Electrical DiagramsLighting and HornsOpen9.Locks > Door Locks — DiagramBody and FrameOpen10.Components > Miscellaneous Components > Horn BrushGeneralOpen11.Components > Modules > Remote Keyless Entry ModuleGeneralOpen12.Components > Motors > Door Lock MotorGeneralOpen13.Components > Relays > Automatic Door Lock RelayGeneralOpen14.Components > Relays > Horn RelayGeneralOpen15.Electrical Diagrams > HornGeneralOpen16.Electrical Diagrams > Trunk Lamp > Dome & Luggage CompartmentGeneralOpen17.Electrical Diagrams > Trunk Lamp > Vanity, Dome, Luggage CompartmentGeneralOpen18.Exploded Views > Door LocksGeneralOpen19.Backup Lamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen20.Backup Lamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen21.Backup Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen22.Backup Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen23.Backup Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen24.Backup Lamp — Electrical DiagramsLighting and HornsOpen25.Hazard Warning Lamps — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen26.Hazard Warning Lamps — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen27.Hazard Warning Lamps — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen28.Hazard Warning Lamps — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen29.Hazard Warning Lamps — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen30.Hazard Warning Lamps — Electrical Diagrams > Part 1 of 2Lighting and HornsOpen31.Hazard Warning Lamps — Electrical Diagrams > Part 2 of 2Lighting and HornsOpen32.Headlamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen33.Headlamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen34.Headlamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen35.Headlamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen36.Headlamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen37.Headlamp — Electrical Diagrams > Less Daytime Running LampsLighting and HornsOpen38.Headlamp — Electrical Diagrams > With Daytime Running LampsLighting and HornsOpen39.Locks > Power Locks — Diagnostic Aids > Pull-to-Seat ConnectorsBody and FrameOpen40.Locks > Power Locks — Diagnostic Aids > Push-to-Seat ConnectorsBody and FrameOpen41.Locks > Power Locks — Diagram Information and Instructions > Cell ReferencesBody and FrameOpen42.Locks > Power Locks — Diagram Information and Instructions > Schematic SymbolsBody and FrameOpen43.Locks > Power Locks — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen44.Locks > Power Locks — Electrical DiagramsBody and FrameOpen45.Turn Signals — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen46.Turn Signals — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen47.Turn Signals — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen48.Turn Signals — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen

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OEM Manual Evidence

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1991 Buick Skylark 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 Skylark 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 Skylark 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 Skylark 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 Skylark Wiring Pages

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Same System, Other Vehicles

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