Wiring Diagram Cluster
1991 Pontiac Grand Prix 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
Grand Prix L4-138 2.3L DOHC QUAD 4
Total Vehicle Diagrams
627
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 Grand Prix hub with repairs, specs, codes, and other systems already tied to this car.
View vehicle repair hub →Likely fix path
Exact Repair Guides
These repair flows most often intersect with headlight diagnosis on this exact vehicle.
Headlight Bulb Replacement →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 > System Diagram > Headlights > With Daytime Running Lamps (DRL) > Except STEGeneralOpen2.Electrical Diagrams > Lighting and Horns > System Diagram > Headlights > With Daytime Running Lamps (DRL) > STEGeneralOpen3.Electrical Diagrams > Lighting and Horns > System Diagram > Headlights > Without Daytime Running Lamps (DRL) > Less Fog LightsGeneralOpen4.Electrical Diagrams > Lighting and Horns > System Diagram > Headlights > Without Daytime Running Lamps (DRL) > With Fog Lights > Except STEGeneralOpen5.Electrical Diagrams > Lighting and Horns > System Diagram > Headlights > Without Daytime Running Lamps (DRL) > With Fog Lights > STEGeneralOpen6.Electrical Diagrams > Headlights > With Daytime Running Lamps (DRL) > Except STELighting and HornsOpen7.Electrical Diagrams > Headlights > With Daytime Running Lamps (DRL) > STELighting and HornsOpen8.Electrical Diagrams > Headlights > Without Daytime Running Lamps (DRL) > Less Fog LightsLighting and HornsOpen9.Electrical Diagrams > Headlights > Without Daytime Running Lamps (DRL) > With Fog Lights > Except STELighting and HornsOpen10.Electrical Diagrams > Headlights > Without Daytime Running Lamps (DRL) > With Fog Lights > STELighting and HornsOpen11.Components > Modules > Daytime Running Lamps (DRL) ModuleGeneralOpen12.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Sedan > W/Daytime Running Lamps > Part 1 of 2GeneralOpen13.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Sedan > W/Daytime Running Lamps > Part 2 of 2GeneralOpen14.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 1 of 7GeneralOpen15.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 2 of 7GeneralOpen16.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 3 of 7GeneralOpen17.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 4 of 7GeneralOpen18.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 5 of 7GeneralOpen19.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 6 of 7GeneralOpen20.Electrical Diagrams > Lighting and Horns > Headlamp Switch > Part 7 of 7GeneralOpen21.Electrical Diagrams > Lighting and Horns > Turn Signals > Without Lamp Monitor > Sedan > Less Daytime Running LampsGeneralOpen22.Electrical Diagrams > Lighting and Horns > Turn Signals > Without Lamp Monitor > Sedan > With Daytime Running LampsGeneralOpen23.Electrical Diagrams > Illuminated Entry and Security LightingLighting and HornsOpen24.Hazard Warning Lamps — Electrical Diagrams > Less Lamp Monitor > Hazard & Turn > Sedan > W/Daytime Running Lamps > Part 1 of 2Lighting and HornsOpen25.Hazard Warning Lamps — Electrical Diagrams > Less Lamp Monitor > Hazard & Turn > Sedan > W/Daytime Running Lamps > Part 2 of 2Lighting and HornsOpen26.Turn Signals — Electrical Diagrams > Without Lamp Monitor > Sedan > Less Daytime Running LampsLighting and HornsOpen27.Turn Signals — Electrical Diagrams > Without Lamp Monitor > Sedan > With Daytime Running LampsLighting and HornsOpen28.Components > Miscellaneous Components > Daytime Running Light DiodeGeneralOpen29.Components > Switches > Headlamp Dimmer & Flash to Pass SwitchGeneralOpen30.Electrical Diagrams > Lighting and Horns > Backup Lamp > Except STEGeneralOpen31.Electrical Diagrams > Lighting and Horns > Backup Lamp > STEGeneralOpen32.Electrical Diagrams > Lighting and Horns > Brake Lamp > With Lamp MonitorGeneralOpen33.Electrical Diagrams > Lighting and Horns > Brake Lamp > Without Lamp MonitorGeneralOpen34.Electrical Diagrams > Lighting and Horns > Dimmer Switch > Except STEGeneralOpen35.Electrical Diagrams > Lighting and Horns > Dimmer Switch > STEGeneralOpen36.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Front Side Marker, Hazard & Turn > Part 1 of 2GeneralOpen37.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Front Side Marker, Hazard & Turn > Part 2 of 2GeneralOpen38.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Coupe > Part 1 of 2GeneralOpen39.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Coupe > Part 2 of 2GeneralOpen40.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Sedan > Less T37 > Part 1 of 2GeneralOpen41.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less Lamp Monitor > Hazard & Turn > Sedan > Less T37 > Part 2 of 2GeneralOpen42.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > W/Lamp MonitorGeneralOpen43.Electrical Diagrams > Lighting and Horns > HornGeneralOpen44.Electrical Diagrams > Lighting and Horns > License Plate Lamp > Less Lamp MonitorGeneralOpen45.Electrical Diagrams > Lighting and Horns > License Plate Lamp > With Lamp MonitorGeneralOpen46.Electrical Diagrams > Lighting and Horns > System Diagram > Exterior Lights > With Lamp Monitor > Front Park & Rear SideGeneralOpen47.Electrical Diagrams > Lighting and Horns > System Diagram > Exterior Lights > With Lamp Monitor > Front Side Marker, Hazard & TurnGeneralOpen48.Electrical Diagrams > Lighting and Horns > System Diagram > Exterior Lights > With Lamp Monitor > License, Rear Marker LightsGeneralOpen
Exact Vehicle Hub
Browse →Repairs That Intersect This Wiring
Browse →Likely Trouble Codes for This System
Browse →More Grand Prix Wiring Pages
Starter Wiring DiagramAlternator Wiring DiagramABS Brake 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 DiagramBody Electrical Wiring Diagram
Same System, Other Vehicles
1991 Toyota Supra Headlight Wiring Diagram1994 Toyota Celica Headlight Wiring Diagram1990 Honda Prelude Headlight Wiring Diagram1993 Honda Accord Headlight Wiring Diagram1991 Ford Thunderbird Headlight Wiring Diagram1992 Ford Crown Victoria Headlight Wiring Diagram1990 Ford Probe Headlight Wiring Diagram1991 Toyota Cressida Headlight Wiring Diagram