Wiring Diagram Cluster
1991 Pontiac Firebird Body Electrical Wiring Diagram
Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.
Matched Diagrams
48
Variant Used
Firebird V6-191 3.1L
Total Vehicle Diagrams
587
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.
Keep context
Vehicle Repair Hub
Step out of raw diagrams and into the full 1991 Pontiac Firebird 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.
1991 Pontiac Firebird 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 →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 > Rear Compartment Lid Pull-DownBody and FrameOpen7.Doors, Hood and Trunk > Trunk / Liftgate — Electrical Diagrams > Rear Compartment 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.Components > Relays > Door Lock Relay AssemblyGeneralOpen15.Components > Relays > Horn RelayGeneralOpen16.Electrical Diagrams > HornGeneralOpen17.Electrical Diagrams > Trunk / Liftgate > Rear Compartment Lid Pull-DownGeneralOpen18.Electrical Diagrams > Trunk / Liftgate > Rear Compartment Lid ReleaseGeneralOpen19.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.Courtesy Lamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen26.Courtesy Lamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen27.Courtesy Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen28.Courtesy Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen29.Courtesy Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen30.Courtesy Lamp — Electrical DiagramsLighting and HornsOpen31.Daytime Running Lamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen32.Daytime Running Lamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen33.Daytime Running Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen34.Daytime Running Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen35.Daytime Running Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen36.Daytime Running Lamp — Electrical DiagramsLighting and HornsOpen37.Fog/Driving Lamp — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen38.Fog/Driving Lamp — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen39.Fog/Driving Lamp — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen40.Fog/Driving Lamp — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen41.Fog/Driving Lamp — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen42.Fog/Driving Lamp — Electrical DiagramsLighting and HornsOpen43.Hazard Warning Lamps — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen44.Hazard Warning Lamps — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen45.Hazard Warning Lamps — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen46.Hazard Warning Lamps — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen47.Hazard Warning Lamps — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen48.Hazard Warning Lamps — Electrical Diagrams > Less T61Lighting and HornsOpen
Exact Vehicle Hub
Browse →OEM Manual Evidence
Browse →Likely Trouble Codes for This System
Browse →More Firebird Wiring Pages
Starter Wiring DiagramAlternator Wiring DiagramHeadlight Wiring DiagramA/C & Heater Wiring DiagramPower Window Wiring DiagramInstrument Cluster Wiring DiagramWiper & Washer Wiring DiagramTransmission Wiring DiagramCruise Control Wiring DiagramAirbag SRS Wiring DiagramEngine Management Wiring Diagram
Same System, Other Vehicles
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