Wiring Diagram Cluster
1991 Cadillac DeVille Headlight Wiring Diagram
Find headlight circuit schematics, high/low beam relay paths, DRL wiring, and ground points for lighting diagnosis.
Matched Diagrams
48
Variant Used
DeVille V8-300 4.9L
Total Vehicle Diagrams
1330
From Diagram To Fix
Use this wiring page as the jump point, not the dead end
Open the exact diagram, then move directly into the vehicle hub, the repair most likely tied to this system, or the code cluster that usually shows up with it.
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Vehicle Repair Hub
Step out of raw diagrams and into the full 1991 Cadillac DeVille hub with repairs, specs, codes, and other systems already tied to this car.
View vehicle repair hub →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.
Open interactive browser →Diagnostic signal
Codes Often Seen With This System
Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.
P0563: System Voltage High →Top Headlight Diagram Paths
1.Electrical Diagrams > Lighting and Horns > Daytime Running LampGeneralOpen2.Electrical Diagrams > Lighting and Horns > HeadlampGeneralOpen3.Daytime Running Lamp — Diagnostic Aids > Tech TipsLighting and HornsOpen4.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Circuit Protection DevicesLighting and HornsOpen5.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > General InformationLighting and HornsOpen6.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Pull-to-Seat ConnectorsLighting and HornsOpen7.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Push-to-Seat ConnectorsLighting and HornsOpen8.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Weather Pack(R) ConnectorsLighting and HornsOpen9.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Diode ReplacementLighting and HornsOpen10.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > General InformationLighting and HornsOpen11.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Repairing Short Circuits Caused By Damaged WireLighting and HornsOpen12.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Copper Wire Using Crimp and Seal Splice SleevesLighting and HornsOpen13.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Copper Wire Using Splice ClipsLighting and HornsOpen14.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Twisted/Shielded CableLighting and HornsOpen15.Daytime Running Lamp — Diagnostic Aids > Typical Electrical Repair Procedures > Terminal RepairsLighting and HornsOpen16.Daytime Running Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen17.Daytime Running Lamp — Diagram Information and Instructions > Commonly Used AbbreviationsLighting and HornsOpen18.Daytime Running Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen19.Daytime Running Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen20.Daytime Running Lamp — Diagram Information and Instructions > Wire Size Conversion TableLighting and HornsOpen21.Daytime Running Lamp — Electrical DiagramsLighting and HornsOpen22.Headlamp — Diagnostic Aids > Tech TipsLighting and HornsOpen23.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Circuit Protection DevicesLighting and HornsOpen24.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > General InformationLighting and HornsOpen25.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Pull-to-Seat ConnectorsLighting and HornsOpen26.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Push-to-Seat ConnectorsLighting and HornsOpen27.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Connector Repair > Weather Pack(R) ConnectorsLighting and HornsOpen28.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Diode ReplacementLighting and HornsOpen29.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > General InformationLighting and HornsOpen30.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Repairing Short Circuits Caused By Damaged WireLighting and HornsOpen31.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Copper Wire Using Crimp and Seal Splice SleevesLighting and HornsOpen32.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Copper Wire Using Splice ClipsLighting and HornsOpen33.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Splicing Twisted/Shielded CableLighting and HornsOpen34.Headlamp — Diagnostic Aids > Typical Electrical Repair Procedures > Terminal RepairsLighting and HornsOpen35.Headlamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen36.Headlamp — Diagram Information and Instructions > Commonly Used AbbreviationsLighting and HornsOpen37.Headlamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen38.Headlamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen39.Headlamp — Diagram Information and Instructions > Wire Size Conversion TableLighting and HornsOpen40.Headlamp — Electrical DiagramsLighting and HornsOpen41.Components > Modules > Twilight/Daytime Running Lamps ModuleGeneralOpen42.Electrical Diagrams > Lighting and Horns > Backup LampGeneralOpen43.Electrical Diagrams > Lighting and Horns > Brake LampGeneralOpen44.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Ash Tray LampGeneralOpen45.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Glove Box LampGeneralOpen46.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > System Diagram > CourtesyGeneralOpen47.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > System Diagram > Opera Lamp > CoupeGeneralOpen48.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > System Diagram > Opera Lamp > SedanGeneralOpen
Exact Vehicle Hub
Browse →Likely Trouble Codes for This System
Browse →More DeVille Wiring Pages
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Same System, Other Vehicles
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