Wiring Diagram Cluster
1987 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 V6-173 2.8L
Total Vehicle Diagrams
439
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 1987 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.
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.
B1318: Battery Voltage Low →Top Body Electrical Diagram Paths
1.Electrical Diagrams > Power Trunk / Liftgate Lock Actuator > Luggage Compartment Lid & Tailgate ReleaseGeneralOpen2.Horn — Diagram Information and InstructionsLighting and HornsOpen3.Horn — Electrical DiagramsLighting and HornsOpen4.Components > Motors > Door Lock MotorsGeneralOpen5.Components > Relays > Door Lock Relay AssemblyGeneralOpen6.Components > Relays > Horn RelayGeneralOpen7.Components > Switches > Horn SwitchGeneralOpen8.Electrical Diagrams > Lighting and Horns > Backup Lamp > Except Trans AmGeneralOpen9.Electrical Diagrams > Lighting and Horns > Backup Lamp > Trans AmGeneralOpen10.Electrical Diagrams > Lighting and Horns > Brake Lamp > With Lamp MonitorGeneralOpen11.Electrical Diagrams > Lighting and Horns > Brake Lamp > Without Lamp MonitorGeneralOpen12.Electrical Diagrams > Lighting and Horns > Cargo LampGeneralOpen13.Electrical Diagrams > Lighting and Horns > Courtesy LampGeneralOpen14.Electrical Diagrams > Lighting and Horns > Dome LampGeneralOpen15.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Front Marker, Hazard, High Level Stop, Park, & TurnGeneralOpen16.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard, Stop & Turn (Trans AM)GeneralOpen17.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Rear Hazard, Stop & Turn (Exc. Trans AM)GeneralOpen18.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > With Lamp Monitor > FT Park, Marker, Hazard & TurnGeneralOpen19.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > With Lamp Monitor > Hazard, Stop & Turn (Exc. Trans AM)GeneralOpen20.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > Less Digital ClusterGeneralOpen21.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Exc. Trans AM (Part 1 of 3)GeneralOpen22.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Exc. Trans AM (Part 2 of 3)GeneralOpen23.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Exc. Trans AM (Part 3 of 3)GeneralOpen24.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Trans AM (Part 1 of 3)GeneralOpen25.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Trans AM (Part 2 of 3)GeneralOpen26.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > W/Digital Cluster Trans AM (Part 3 of 3)GeneralOpen27.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Headlight DoorsGeneralOpen28.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > With Fog LampsGeneralOpen29.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > With Lamp MonitorGeneralOpen30.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > With Lamp Monitor & Fog LampsGeneralOpen31.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Without Fog Lamps Less Lamp MonitorGeneralOpen32.Electrical Diagrams > Lighting and Horns > HornGeneralOpen33.Electrical Diagrams > Lighting and Horns > License Plate Lamp > Less Lamp MonitorGeneralOpen34.Electrical Diagrams > Lighting and Horns > License Plate Lamp > With Lamp Monitor > Except Trans AMGeneralOpen35.Electrical Diagrams > Lighting and Horns > License Plate Lamp > With Lamp Monitor > Trans AMGeneralOpen36.Electrical Diagrams > Lighting and Horns > Map LightGeneralOpen37.Electrical Diagrams > Lighting and Horns > Marker Lamp > Front Marker, Park, Hazard & Turn > Less Lamp Monitor > Except Trans AMGeneralOpen38.Electrical Diagrams > Lighting and Horns > Marker Lamp > Front Marker, Park, Hazard & Turn > Less Lamp Monitor > Trans AMGeneralOpen39.Electrical Diagrams > Lighting and Horns > Marker Lamp > Front Marker, Park, Hazard & Turn > With Lamp MonitorGeneralOpen40.Electrical Diagrams > Lighting and Horns > Marker Lamp > Rear Marker/License/Tail Lamps > Less Lamp Monitor > Except Trans AMGeneralOpen41.Electrical Diagrams > Lighting and Horns > Marker Lamp > Rear Marker/License/Tail Lamps > Less Lamp Monitor > Trans AMGeneralOpen42.Electrical Diagrams > Lighting and Horns > Marker Lamp > Rear Marker/License/Tail Lamps > With Lamp Monitor > Except Trans AMGeneralOpen43.Electrical Diagrams > Lighting and Horns > Marker Lamp > Rear Marker/License/Tail Lamps > With Lamp Monitor > Trans AmGeneralOpen44.Electrical Diagrams > Lighting and Horns > Parking Lamp > Less Lamp Monitor > Except Trans AmGeneralOpen45.Electrical Diagrams > Lighting and Horns > Parking Lamp > Less Lamp Monitor > Trans AmGeneralOpen46.Electrical Diagrams > Lighting and Horns > Parking Lamp > With Lamp MonitorGeneralOpen47.Electrical Diagrams > Lighting and Horns > System Diagram > Cargo Compartment LightGeneralOpen48.Electrical Diagrams > Lighting and Horns > System Diagram > Cigar Lighter, Courtesy, Dome, Glove Box & ReadingGeneralOpen
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