Wiring Diagram Cluster
1991 Pontiac Grand Prix Alternator Wiring Diagram
Find charging-system schematics including alternator field/control wiring, battery feeds, and fuse/relay paths.
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.
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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 alternator diagnosis on this exact vehicle.
Alternator 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 Alternator Diagram Paths
1.Electrical Diagrams > Starting and Charging > Charging System > AlternatorGeneralOpen2.Charging System — Diagnostic Aids > Pull-to-Seat ConnectorsStarting and ChargingOpen3.Charging System — Diagnostic Aids > Push-to-Seat ConnectorsStarting and ChargingOpen4.Charging System — Diagram Information and Instructions > Cell ReferencesStarting and ChargingOpen5.Charging System — Diagram Information and Instructions > Schematic SymbolsStarting and ChargingOpen6.Charging System — Diagram Information and Instructions > Wire Color Code IdentificationStarting and ChargingOpen7.Charging System — Electrical DiagramsStarting and ChargingOpen8.Electrical Diagrams > Starting and Charging > Charging System > System DiagramGeneralOpen9.Electrical Diagrams > Starting and Charging > System DiagramGeneralOpen10.Components > Miscellaneous Components > Generator Cooling FanGeneralOpen11.Electrical Diagrams > Starting and Charging > Battery > Battery CableGeneralOpen12.Electrical Diagrams > Starting and Charging > Battery > System DiagramGeneralOpen13.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > ABS 2, A/C 1 & A/C 2 FusesGeneralOpen14.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Belt, ECM & Tail FusesGeneralOpen15.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > CLUST, Elect, Panel, Tl 1 & Tl 2 FusesGeneralOpen16.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Component Center > Part 1 of 2GeneralOpen17.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Component Center > Part 2 of 2GeneralOpen18.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Ctsy Fuse > Except STE > Part 1 of 2GeneralOpen19.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Ctsy Fuse > Except STE > Part 2 of 2GeneralOpen20.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Ctsy Fuse > STE > Part 1 of 2GeneralOpen21.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Ctsy Fuse > STE > Part 2 of 2GeneralOpen22.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Horn, Radio, Stop & Wiper FusesGeneralOpen23.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > Indic and Turn FusesGeneralOpen24.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Fuse Block Diagrams > LS Electrical CenterGeneralOpen25.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Fuse Block Diagrams > RS Electrical CenterGeneralOpen26.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G101 & G102 > Except STEGeneralOpen27.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G101 & G102 > STEGeneralOpen28.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G102 & G119GeneralOpen29.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103GeneralOpen30.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103 & G111GeneralOpen31.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103 & G303 > Except STE > Part 1 of 2GeneralOpen32.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103 & G303 > Except STE > Part 2 of 2GeneralOpen33.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103 & G303 > STE > Part 1 of 2GeneralOpen34.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G103 & G303 > STE > Part 2 of 2GeneralOpen35.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G104 & G105GeneralOpen36.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G106, G119, G120, G200GeneralOpen37.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G303 > Part 1 of 2GeneralOpen38.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G303 > Part 2 of 2GeneralOpen39.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G305GeneralOpen40.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Ground Distribution > G306GeneralOpen41.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Power Distribution Wiring Circuit > Part 1 of 5GeneralOpen42.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Power Distribution Wiring Circuit > Part 2 of 5GeneralOpen43.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Power Distribution Wiring Circuit > Part 3 of 5GeneralOpen44.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Power Distribution Wiring Circuit > Part 4 of 5GeneralOpen45.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > System Diagram > Power Distribution Wiring Circuit > Part 5 of 5GeneralOpen46.Electrical Diagrams > Starting and Charging > Starting System > Neutral Safety SwitchGeneralOpen47.Electrical Diagrams > Starting and Charging > Starting System > Starter MotorGeneralOpen48.Electrical Diagrams > Starting and Charging > Starting System > Starter SolenoidGeneralOpen
Exact Vehicle Hub
Browse →Repairs That Intersect This Wiring
Browse →1991 Pontiac Grand Prix Alternator ReplacementRepair
Open the matching repair workflow that usually intersects with alternator diagnosis on this vehicle.
1991 Pontiac Grand Prix Battery ReplacementRepair
Open the matching repair workflow that usually intersects with alternator diagnosis on this vehicle.
1991 Pontiac Grand Prix Serpentine Belt ReplacementRepair
Open the matching repair workflow that usually intersects with alternator diagnosis on this vehicle.
Likely Trouble Codes for This System
Browse →P0563: System Voltage HighCode
Electrical code commonly seen during alternator diagnosis.
P0562: System Voltage LowCode
Electrical code commonly seen during alternator diagnosis.
B1318: Battery Voltage LowCode
Body/Electrical code commonly seen during alternator diagnosis.
P0601: ECM/PCM Memory Check Sum ErrorCode
Electrical code commonly seen during alternator diagnosis.
B0001: Driver Frontal Stage 1 Deployment ControlCode
Body/Electrical code commonly seen during alternator diagnosis.
B0010: Passenger Frontal Stage 1 Deployment ControlCode
Body/Electrical code commonly seen during alternator diagnosis.
More Grand Prix Wiring Pages
Starter Wiring DiagramHeadlight 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
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