Wiring Diagram Cluster
1990 Pontiac Grand AM 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 AM L4-138 2.3L VIN A FI HP
Total Vehicle Diagrams
507
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 AM 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 > Doors — DiagramBody and FrameOpen2.Doors, Hood and Trunk > Doors > Front Door — DiagramBody and FrameOpen3.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Pull-to-Seat ConnectorsBody and FrameOpen4.Doors, Hood and Trunk > Trunk / Liftgate — Diagnostic Aids > Push-to-Seat ConnectorsBody and FrameOpen5.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Cell ReferencesBody and FrameOpen6.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Schematic SymbolsBody and FrameOpen7.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Symbol IdentificationBody and FrameOpen8.Doors, Hood and Trunk > Trunk / Liftgate — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen9.Doors, Hood and Trunk > Trunk / Liftgate — Electrical DiagramsBody and FrameOpen10.Horn — Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen11.Horn — Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen12.Horn — Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen13.Horn — Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen14.Horn — Diagram Information and Instructions > Symbol IdentificationLighting and HornsOpen15.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen16.Horn — Electrical DiagramsLighting and HornsOpen17.Locks > Door Locks — DiagramBody and FrameOpen18.Components > Motors > Door Lock MotorGeneralOpen19.Components > Relays > Door Lock Relay AssemblyGeneralOpen20.Components > Relays > Horn RelayGeneralOpen21.Electrical Diagrams > Lighting and Horns > Backup LampGeneralOpen22.Electrical Diagrams > Lighting and Horns > Brake LampGeneralOpen23.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Cigar and Instrument PanelGeneralOpen24.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Courtesy and Illuminated EntryGeneralOpen25.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Courtesy, Dome, Luggage and ReadingGeneralOpen26.Electrical Diagrams > Lighting and Horns > Daytime Running Lamp > LE ModelGeneralOpen27.Electrical Diagrams > Lighting and Horns > Daytime Running Lamp > SE ModelGeneralOpen28.Electrical Diagrams > Lighting and Horns > Dimmer SwitchGeneralOpen29.Electrical Diagrams > Lighting and Horns > Dome Lamp > Courtesy, Dome, Luggage and ReadingGeneralOpen30.Electrical Diagrams > Lighting and Horns > Dome Lamp > Dome, Luggage and Windshield HeaderGeneralOpen31.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > LE ModelGeneralOpen32.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > SE Models > Part 1 of 3GeneralOpen33.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > SE Models > Part 2 of 3GeneralOpen34.Electrical Diagrams > Lighting and Horns > Hazard Warning Lamps > SE Models > Part 3 of 3GeneralOpen35.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > Le Models > Part 1 of 2GeneralOpen36.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > Le Models > Part 2 of 2GeneralOpen37.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > SE Models > Part 1 of 2GeneralOpen38.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp Switch > SE Models > Part 2 of 2GeneralOpen39.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Le Models > Less Fog LampsGeneralOpen40.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > Le Models > With Fog LampsGeneralOpen41.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > SE Models > Part 1 of 2GeneralOpen42.Electrical Diagrams > Lighting and Horns > Headlamp > System Diagram > SE Models > Part 2 of 2GeneralOpen43.Electrical Diagrams > Lighting and Horns > HornGeneralOpen44.Electrical Diagrams > Lighting and Horns > License Plate Lamp > LE ModelGeneralOpen45.Electrical Diagrams > Lighting and Horns > License Plate Lamp > SE ModelGeneralOpen46.Electrical Diagrams > Lighting and Horns > Map LightGeneralOpen47.Electrical Diagrams > Lighting and Horns > Marker Lamp > LE Models > Front Marker, Hazard, Park and Turn > Part 1 of 2GeneralOpen48.Electrical Diagrams > Lighting and Horns > Marker Lamp > LE Models > Front Marker, Hazard, Park and Turn > Part 2 of 2GeneralOpen
Exact Vehicle Hub
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