Wiring Diagram Cluster
1990 Porsche 928 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
928 GT V8-4957cc 5.0L
Total Vehicle Diagrams
263
From Diagram To Fix
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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 Porsche 928 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.
1990 Porsche 928 A L L Diagnostic Trouble Codes ( DTC ) →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 →Top A/C & Heater Diagram Paths
1.Electrical Diagrams > Heating and Air Conditioning > Compressor HVAC > Compressor ClutchGeneralOpen2.Electrical Diagrams > Heating and Air Conditioning > Compressor HVAC > System DiagramGeneralOpen3.Compressor HVAC — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ComponentsHeating and Air ConditioningOpen4.Compressor HVAC — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ConnectorsHeating and Air ConditioningOpen5.Compressor HVAC — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > GroundsHeating and Air ConditioningOpen6.Compressor HVAC — Diagram Information and Instructions > How to Use DiagramsHeating and Air ConditioningOpen7.Compressor HVAC — Diagram Information and Instructions > Wire Color Code IdentificationHeating and Air ConditioningOpen8.Compressor HVAC — Electrical DiagramsHeating and Air ConditioningOpen9.Electrical Diagrams > Heating and Air Conditioning > Ambient Temperature Sensor / Switch HVACGeneralOpen10.Electrical Diagrams > Heating and Air Conditioning > Aspirator, HVACGeneralOpen11.Electrical Diagrams > Heating and Air Conditioning > Control Assembly, HVACGeneralOpen12.Electrical Diagrams > Heating and Air Conditioning > Control Module HVACGeneralOpen13.Electrical Diagrams > Heating and Air Conditioning > Coolant Temperature Sensor / Switch HVACGeneralOpen14.Electrical Diagrams > Heating and Air Conditioning > Refrigerant Pressure Sensor / Switch, HVACGeneralOpen15.Electrical Diagrams > Heating and Air Conditioning > Blower MotorGeneralOpen16.Electrical Diagrams > Heating and Air Conditioning > Blower Motor ResistorGeneralOpen17.Electrical Diagrams > Heating and Air Conditioning > Blower Motor SwitchGeneralOpen18.Exploded Views > Housing Assembly HVACGeneralOpen19.Vacuum and Vapor Hose Diagrams > Heating and Air ConditioningGeneralOpen20.Antilock Brakes / Traction Control Systems — Connector ViewsBrakes and Traction ControlOpen21.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ComponentsBrakes and Traction ControlOpen22.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ConnectorsBrakes and Traction ControlOpen23.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > GroundsBrakes and Traction ControlOpen24.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > How to Use DiagramsBrakes and Traction ControlOpen25.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Wire Color Code IdentificationBrakes and Traction ControlOpen26.Antilock Brakes / Traction Control Systems — Electrical DiagramsBrakes and Traction ControlOpen27.Antilock Brakes / Traction Control Systems — Mechanical DiagramsBrakes and Traction ControlOpen28.Vacuum and Vapor Hose DiagramsHeating and Air ConditioningOpen29.Connector Views > Antilock Brakes / Traction Control SystemsGeneralOpen30.Electrical Diagrams > Accessories and Optional Equipment > Antitheft and Alarm SystemsGeneralOpen31.Electrical Diagrams > Accessories and Optional Equipment > Radio/StereoGeneralOpen32.Electrical Diagrams > Accessories and Optional Equipment > System DiagramGeneralOpen33.Electrical Diagrams > Antilock Brakes / Traction Control SystemsGeneralOpen34.Electrical Diagrams > Heating and Air Conditioning > Cabin Temperature Sensor / SwitchGeneralOpen35.Electrical Diagrams > Heating and Air Conditioning > Condenser FanGeneralOpen36.Electrical Diagrams > Heating and Air Conditioning > Evaporator Temperature Sensor / SwitchGeneralOpen37.Electrical Diagrams > Heating and Air Conditioning > Refrigerant Temperature SensorGeneralOpen38.Electrical Diagrams > Heating and Air Conditioning > System DiagramGeneralOpen39.Mechanical Diagrams > Antilock Brakes / Traction Control SystemsGeneralOpen40.Vacuum and Vapor Hose Diagrams > Air InjectionGeneralOpen41.Vacuum and Vapor Hose Diagrams > Evaporative Emissions SystemGeneralOpen42.Vacuum and Vapor Hose Diagrams > Positive Crankcase VentilationGeneralOpen43.Antitheft and Alarm Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ComponentsAccessories and Optional EquipmentOpen44.Antitheft and Alarm Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > ConnectorsAccessories and Optional EquipmentOpen45.Antitheft and Alarm Systems — Diagram Information and Instructions > Component, Connector, Ground and Splice Locations > GroundsAccessories and Optional EquipmentOpen46.Antitheft and Alarm Systems — Diagram Information and Instructions > How to Use DiagramsAccessories and Optional EquipmentOpen47.Antitheft and Alarm Systems — Diagram Information and Instructions > Wire Color Code IdentificationAccessories and Optional EquipmentOpen48.Antitheft and Alarm Systems — Electrical DiagramsAccessories and Optional EquipmentOpen
Exact Vehicle Hub
Browse →OEM Manual Evidence
Browse →1990 Porsche 928 A L L Diagnostic Trouble Codes ( DTC )OEM Manual
A L L Diagnostic Trouble Codes ( DTC ) — 1990 Porsche 928 S4 V8-4957cc 5.0L Service Manual | Operation CHARM Operation CHARM : Car repair m...
1990 Porsche 928 A L L Diagnostic Trouble Codes ( DTC )OEM Manual
A L L Diagnostic Trouble Codes ( DTC ) — 1990 Porsche 928 GT V8-4957cc 5.0L Service Manual | Operation CHARM Operation CHARM : Car repair m...
1990 Porsche 928 Diagnostic Trouble CodesOEM Manual
Repair and Diagnosis: Diagnostic Trouble Codes — 1990 Porsche 928 GT V8-4957cc 5.0L Service Manual | Operation CHARM Operation CHARM : Car...
1990 Porsche 928 Diagnostic Trouble CodesOEM Manual
Repair and Diagnosis: Diagnostic Trouble Codes — 1990 Porsche 928 S4 V8-4957cc 5.0L Service Manual | Operation CHARM Operation CHARM : Car...
More 928 Wiring Pages
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