Wiring Diagram Cluster

1991 Chevrolet Lumina A/C & Heater Wiring Diagram

Find A/C compressor clutch wiring, blower motor circuits, temperature control module paths, and refrigerant pressure switch schematics.

Matched Diagrams

48

Variant Used

Lumina L4-151 2.5L

Total Vehicle Diagrams

551

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 Chevrolet Lumina hub with repairs, specs, codes, and other systems already tied to this car.

View vehicle repair hub β†’

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.

1991 Chevrolet Lumina A L L Diagnostic Trouble Codes ( DTC ) β†’

Stay in wiring

More System Pages for This Vehicle

Move laterally into the neighboring systems that usually share the same electrical neighborhood.

Starter Wiring Diagram β†’

Top A/C & Heater Diagram Paths

1.Electrical Diagrams > Heating and Air Conditioning > Air Door Actuator / Motor, HVAC > With A/CGeneralOpen2.Electrical Diagrams > Heating and Air Conditioning > Air Door Actuator / Motor, HVAC > Without A/C > Air DeliveryGeneralOpen3.Electrical Diagrams > Heating and Air Conditioning > Air Door Actuator / Motor, HVAC > Without A/C > Temperature ControlsGeneralOpen4.Electrical Diagrams > Heating and Air Conditioning > Compressor HVACGeneralOpen5.Vacuum and Vapor Hose Diagrams > Heating and Air Conditioning > Air Door Actuator / Motor, HVAC > With A/CGeneralOpen6.Vacuum and Vapor Hose Diagrams > Heating and Air Conditioning > Air Door Actuator / Motor, HVAC > Without A/CGeneralOpen7.Compressor HVAC β€” Diagnostic Aids > Pull-to-Seat ConnectorsHeating and Air ConditioningOpen8.Compressor HVAC β€” Diagnostic Aids > Push-to-Seat ConnectorsHeating and Air ConditioningOpen9.Compressor HVAC β€” Diagram Information and Instructions > Cell ReferencesHeating and Air ConditioningOpen10.Compressor HVAC β€” Diagram Information and Instructions > Schematic SymbolsHeating and Air ConditioningOpen11.Compressor HVAC β€” Diagram Information and Instructions > Wire Color Code IdentificationHeating and Air ConditioningOpen12.Compressor HVAC β€” Electrical DiagramsHeating and Air ConditioningOpen13.Components > Miscellaneous Components > Heater/Defrost BI-Directional Vacuum ActuatorGeneralOpen14.Electrical Diagrams > Heating and Air Conditioning > Blower Motor > With A/CGeneralOpen15.Electrical Diagrams > Heating and Air Conditioning > Blower Motor > Without A/CGeneralOpen16.Electrical Diagrams > Heating and Air Conditioning > Control Assembly, HVACGeneralOpen17.Vacuum and Vapor Hose Diagrams > Heating and Air Conditioning > System Diagram > Less A/CGeneralOpen18.Vacuum and Vapor Hose Diagrams > Heating and Air Conditioning > System Diagram > With A/CGeneralOpen19.Vacuum and Vapor Hose Diagrams > Less A/CHeating and Air ConditioningOpen20.Vacuum and Vapor Hose Diagrams > With A/CHeating and Air ConditioningOpen21.Components > Miscellaneous Components > A/C Valve Vacuum ActuatorGeneralOpen22.Components > Miscellaneous Components > Heater, A/C Control AssemblyGeneralOpen23.Components > Relays > A/C Compressor RelayGeneralOpen24.Components > Switches > A/C Compressor/Engine Cooling Fan Temperature SwitchGeneralOpen25.Electrical Diagrams > Heating and Air Conditioning > System Diagram > Blower ControlsGeneralOpen26.Electrical Diagrams > Heating and Air Conditioning > System Diagram > Compressor ControlsGeneralOpen27.Exploded Views > Housing Assembly HVAC > Part 1 of 2GeneralOpen28.Exploded Views > Housing Assembly HVAC > Part 2 of 2GeneralOpen29.Electrical Diagrams > Blower ControlsHeating and Air ConditioningOpen30.Electrical Diagrams > Compressor ControlsHeating and Air ConditioningOpen31.Radio, Stereo, and Compact Disc β€” Diagnostic Aids > Pull-to-Seat ConnectorsAccessories and Optional EquipmentOpen32.Radio, Stereo, and Compact Disc β€” Diagnostic Aids > Push-to-Seat ConnectorsAccessories and Optional EquipmentOpen33.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Cell ReferencesAccessories and Optional EquipmentOpen34.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Schematic SymbolsAccessories and Optional EquipmentOpen35.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Wire Color Code IdentificationAccessories and Optional EquipmentOpen36.Radio, Stereo, and Compact Disc β€” Electrical DiagramsAccessories and Optional EquipmentOpen37.Backup Lamp β€” Diagnostic Aids > Pull-to-Seat ConnectorsLighting and HornsOpen38.Backup Lamp β€” Diagnostic Aids > Push-to-Seat ConnectorsLighting and HornsOpen39.Backup Lamp β€” Diagram Information and Instructions > Cell ReferencesLighting and HornsOpen40.Backup Lamp β€” Diagram Information and Instructions > Schematic SymbolsLighting and HornsOpen41.Backup Lamp β€” Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen42.Backup Lamp β€” Electrical DiagramsLighting and HornsOpen43.Components > Miscellaneous Components > BI-Level Valve Vacuum ActuatorGeneralOpen44.Components > Miscellaneous Components > Blower ResistorsGeneralOpen45.Components > Miscellaneous Components > Power Seat/Door Lock/Antenna Circuit BreakerGeneralOpen46.Components > Miscellaneous Components > Rear Window Defrost Circuit BreakerGeneralOpen47.Components > Miscellaneous Components > Recirculating Valve Vacuum ActuatorGeneralOpen48.Components > Miscellaneous Components > Vacuum Release ValveGeneralOpen