Wiring Diagram Cluster
1991 Pontiac Grand Prix Instrument Cluster Wiring Diagram
Find instrument panel wiring, gauge sender circuits, warning light paths, and speedometer/tachometer schematics.
Matched Diagrams
32
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 →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.
U0073: Control Module Communication Bus Off →Top Instrument Cluster Diagram Paths
1.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Electronic Instrument Cluster > BaseGeneralOpen2.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Electronic Instrument Cluster > GagesGeneralOpen3.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Instrument Cluster > Part 1 of 3GeneralOpen4.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Instrument Cluster > Part 2 of 3GeneralOpen5.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Instrument Cluster > Part 3 of 3GeneralOpen6.Electrical Diagrams > Electronic Instrument Cluster > BaseInstrument Panel, Gauges and Warning IndicatorsOpen7.Electrical Diagrams > Electronic Instrument Cluster > GagesInstrument Panel, Gauges and Warning IndicatorsOpen8.Electrical Diagrams > Instrument Cluster > Part 1 of 3Instrument Panel, Gauges and Warning IndicatorsOpen9.Electrical Diagrams > Instrument Cluster > Part 2 of 3Instrument Panel, Gauges and Warning IndicatorsOpen10.Electrical Diagrams > Instrument Cluster > Part 3 of 3Instrument Panel, Gauges and Warning IndicatorsOpen11.Connector Views > Instrument Panel, Gauges and Warning Indicators > Base > Terminals C1-C16GeneralOpen12.Connector Views > Instrument Panel, Gauges and Warning Indicators > Base > Terminals D1-D16GeneralOpen13.Connector Views > Instrument Panel, Gauges and Warning Indicators > Gages > Terminals C1-C16GeneralOpen14.Connector Views > Instrument Panel, Gauges and Warning Indicators > Gages > Terminals D1-D16GeneralOpen15.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > Driver/Vehicle Information Display > Electronic CompassGeneralOpen16.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > Driver/Vehicle Information Display > Electronic Module (STE)GeneralOpen17.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Alarms & WarningGeneralOpen18.Electrical Diagrams > Instrument Panel, Gauges and Warning Indicators > System Diagram > Steering Wheel ControlsGeneralOpen19.Connector Views > Base > Terminals C1-C16Instrument Panel, Gauges and Warning IndicatorsOpen20.Connector Views > Base > Terminals D1-D16Instrument Panel, Gauges and Warning IndicatorsOpen21.Connector Views > Gages > Terminals C1-C16Instrument Panel, Gauges and Warning IndicatorsOpen22.Connector Views > Gages > Terminals D1-D16Instrument Panel, Gauges and Warning IndicatorsOpen23.Diagnostic Aids > Pull-to-Seat ConnectorsInstrument Panel, Gauges and Warning IndicatorsOpen24.Diagnostic Aids > Push-to-Seat ConnectorsInstrument Panel, Gauges and Warning IndicatorsOpen25.Diagram Information and Instructions > Cell ReferencesInstrument Panel, Gauges and Warning IndicatorsOpen26.Diagram Information and Instructions > Schematic SymbolsInstrument Panel, Gauges and Warning IndicatorsOpen27.Diagram Information and Instructions > Wire Color Code IdentificationInstrument Panel, Gauges and Warning IndicatorsOpen28.Electrical Diagrams > Alarms & WarningInstrument Panel, Gauges and Warning IndicatorsOpen29.Electrical Diagrams > Steering Wheel ControlsInstrument Panel, Gauges and Warning IndicatorsOpen30.Components > Miscellaneous Components > Tachometer TestGeneralOpen31.Electrical Diagrams > Brake Warning IndicatorGeneralOpen32.Electrical Diagrams > Starting and Charging > Power and Ground Distribution > Fuse > CLUST, Elect, Panel, Tl 1 & Tl 2 FusesGeneralOpen
Exact Vehicle Hub
Browse →Likely Trouble Codes for This System
Browse →U0073: Control Module Communication Bus OffCode
Network/Communication code commonly seen during instrument cluster diagnosis.
B0001: Driver Frontal Stage 1 Deployment ControlCode
Body/Electrical code commonly seen during instrument cluster diagnosis.
B0010: Passenger Frontal Stage 1 Deployment ControlCode
Body/Electrical code commonly seen during instrument cluster diagnosis.
P0218: Transmission Fluid Over TemperatureCode
Transmission code commonly seen during instrument cluster diagnosis.
P0562: System Voltage LowCode
Electrical code commonly seen during instrument cluster diagnosis.
P0700: Transmission Control SystemCode
Transmission code commonly seen during instrument cluster diagnosis.
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