Wiring Diagram Cluster
1990 Pontiac Grand Prix Body Electrical Wiring Diagram
Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.
Matched Diagrams
48
Variant Used
Grand Prix L4-138 2.3L DOHC QUAD 4
Total Vehicle Diagrams
623
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 1990 Pontiac Grand Prix 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.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 > Symbol IdentificationBody and FrameOpen6.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen7.Doors, Hood and Trunk > Trunk / Liftgate — Electrical DiagramsBody and FrameOpen8.Locks > Keyless Entry — Diagnostic Aids > Pull-to-Seat ConnectorsBody and FrameOpen9.Locks > Keyless Entry — Diagnostic Aids > Push-to-Seat ConnectorsBody and FrameOpen10.Locks > Keyless Entry — Diagram Information and Instructions > Cell ReferencesBody and FrameOpen11.Locks > Keyless Entry — Diagram Information and Instructions > Schematic SymbolsBody and FrameOpen12.Locks > Keyless Entry — Diagram Information and Instructions > Symbol IdentificationBody and FrameOpen13.Locks > Keyless Entry — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen14.Locks > Keyless Entry — Electrical DiagramsBody and FrameOpen15.Antitheft and Alarm Systems > Keyless Entry — Diagnostic Aids > Pull-to-Seat ConnectorsAccessories and Optional EquipmentOpen16.Antitheft and Alarm Systems > Keyless Entry — Diagnostic Aids > Push-to-Seat ConnectorsAccessories and Optional EquipmentOpen17.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Cell ReferencesAccessories and Optional EquipmentOpen18.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Schematic SymbolsAccessories and Optional EquipmentOpen19.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Symbol IdentificationAccessories and Optional EquipmentOpen20.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Wire Color Code IdentificationAccessories and Optional EquipmentOpen21.Antitheft and Alarm Systems > Keyless Entry — Electrical DiagramsAccessories and Optional EquipmentOpen22.Components > Modules > Keyless Entry ModuleGeneralOpen23.Electrical Diagrams > Keyless EntryGeneralOpen24.Electrical Diagrams > Lighting and Horns > Backup Lamp > Except STEGeneralOpen25.Electrical Diagrams > Lighting and Horns > Backup Lamp > With STE & Lamp MonitorGeneralOpen26.Electrical Diagrams > Lighting and Horns > Brake LampGeneralOpen27.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Dome, Front Header With Rear Courtesy & Inside Rear View MirrorGeneralOpen28.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Door Key Lock & Underhood Light, Door Courtesy & WarningGeneralOpen29.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Reading/Vanity & Inside Lighted Mirror, Front Header & CourtesyGeneralOpen30.Electrical Diagrams > Lighting and Horns > Dimmer SwitchGeneralOpen31.Electrical Diagrams > Lighting and Horns > Dome LampGeneralOpen32.Electrical Diagrams > Lighting and Horns > Fog/Driving Lamp > Less STEGeneralOpen33.Electrical Diagrams > Lighting and Horns > Fog/Driving Lamp > With STEGeneralOpen34.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > Less STEGeneralOpen35.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > With STEGeneralOpen36.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > Less STEGeneralOpen37.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > With STEGeneralOpen38.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Headlamps (Fog Lamps) > Less STEGeneralOpen39.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Headlamps (Fog Lamps) > With STEGeneralOpen40.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > HeadlightsGeneralOpen41.Electrical Diagrams > Lighting and Horns > HornGeneralOpen42.Electrical Diagrams > Lighting and Horns > License Plate Lamp > Less STEGeneralOpen43.Electrical Diagrams > Lighting and Horns > License Plate Lamp > With STEGeneralOpen44.Electrical Diagrams > Lighting and Horns > Map LightGeneralOpen45.Electrical Diagrams > Lighting and Horns > Marker Lamp > Less STEGeneralOpen46.Electrical Diagrams > Lighting and Horns > Marker Lamp > With STE > Front Park, & Rear Side Marker With Lamp MonitorGeneralOpen47.Electrical Diagrams > Lighting and Horns > Marker Lamp > With STE > Front Side Marker, Hazard & Turn Lamp MonitorGeneralOpen48.Electrical Diagrams > Lighting and Horns > Marker Lamp > With STE > License & Rear Marker With Lamp MonitorGeneralOpen
Exact Vehicle Hub
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Same System, Other Vehicles
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