Wiring Diagram Cluster

1990 Volkswagen Passat 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

Passat L4-1984cc 2.0L DOHC (9A)

Total Vehicle Diagrams

622

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 1990 Volkswagen Passat 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.

1990 Volkswagen Passat 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.Exploded Views > Heating and Air Conditioning > Compressor HVACGeneralOpen2.Compressor HVAC β€” DiagramHeating and Air ConditioningOpen3.Electrical Diagrams > Heating and Air Conditioning > Ambient Temperature Sensor / Switch HVACGeneralOpen4.Electrical Diagrams > Heating and Air Conditioning > Condenser Fan Motor Relay, HVACGeneralOpen5.Electrical Diagrams > Heating and Air Conditioning > Control Module HVACGeneralOpen6.Electrical Diagrams > Heating and Air Conditioning > Refrigerant Pressure Sensor / Switch, HVACGeneralOpen7.Exploded Views > Heating and Air Conditioning > Control Assembly, HVACGeneralOpen8.Exploded Views > Heating and Air Conditioning > System Diagram > HVAC System ControlsGeneralOpen9.Exploded Views > HVAC System ControlsHeating and Air ConditioningOpen10.Electrical Diagrams > Heating and Air Conditioning > Blower MotorGeneralOpen11.Electrical Diagrams > Heating and Air Conditioning > Compressor ClutchGeneralOpen12.Electrical Diagrams > Heating and Air Conditioning > Compressor Clutch RelayGeneralOpen13.Engine > Drive Belts, Mounts, Brackets and Accessories β€” Less Air ConditioningEngine, Cooling and ExhaustOpen14.Engine > Drive Belts, Mounts, Brackets and Accessories β€” With Air ConditioningEngine, Cooling and ExhaustOpen15.Exploded Views > Heating and Air Conditioning > Heater CoreGeneralOpen16.Mechanical Diagrams > Drive Belts, Mounts, Brackets and Accessories > System Diagram > Less Air ConditioningGeneralOpen17.Mechanical Diagrams > Drive Belts, Mounts, Brackets and Accessories > System Diagram > With Air ConditioningGeneralOpen18.Vacuum and Vapor Hose Diagrams > Heating and Air ConditioningGeneralOpen19.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > How to Find the Correct Wiring Diagram, Important Stuff !Brakes and Traction ControlOpen20.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > How to Read Displayed Page of Wiring Diagram, Important Stuff !Brakes and Traction ControlOpen21.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > Symbols Used In Wiring DiagramsBrakes and Traction ControlOpen22.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Brakes and Traction ControlOpen23.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > Wire Color Code IdentificationBrakes and Traction ControlOpen24.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > Wire Size ConversionBrakes and Traction ControlOpen25.Antilock Brakes / Traction Control Systems β€” Diagram Information and Instructions > Wiring Diagram Circuit IdentificationBrakes and Traction ControlOpen26.Antilock Brakes / Traction Control Systems β€” Electrical DiagramsBrakes and Traction ControlOpen27.Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Brakes and Traction ControlOpen28.Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Heating and Air ConditioningOpen29.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > How to Find the Correct Wiring Diagram, Important Stuff !Accessories and Optional EquipmentOpen30.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > How to Read Displayed Page of Wiring Diagram, Important Stuff !Accessories and Optional EquipmentOpen31.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Symbols Used In Wiring DiagramsAccessories and Optional EquipmentOpen32.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Accessories and Optional EquipmentOpen33.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Wire Color Code IdentificationAccessories and Optional EquipmentOpen34.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Wire Size ConversionAccessories and Optional EquipmentOpen35.Radio, Stereo, and Compact Disc β€” Diagram Information and Instructions > Wiring Diagram Circuit IdentificationAccessories and Optional EquipmentOpen36.Radio, Stereo, and Compact Disc β€” Electrical Diagrams > Stereo Radio W/Four SpeakersAccessories and Optional EquipmentOpen37.Radio, Stereo, and Compact Disc β€” Electrical Diagrams > Stereo Radio W/Six Powered SpeakersAccessories and Optional EquipmentOpen38.Vacuum and Vapor Hose DiagramsHeating and Air ConditioningOpen39.Automatic Transmission/Transaxle β€” Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Transmission and DrivetrainOpen40.Backup Lamp β€” Diagram Information and Instructions > How to Find the Correct Wiring Diagram, Important Stuff !Lighting and HornsOpen41.Backup Lamp β€” Diagram Information and Instructions > How to Read Displayed Page of Wiring Diagram, Important Stuff !Lighting and HornsOpen42.Backup Lamp β€” Diagram Information and Instructions > Symbols Used In Wiring DiagramsLighting and HornsOpen43.Backup Lamp β€” Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Lighting and HornsOpen44.Backup Lamp β€” Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen45.Backup Lamp β€” Diagram Information and Instructions > Wire Size ConversionLighting and HornsOpen46.Backup Lamp β€” Diagram Information and Instructions > Wiring Diagram Circuit IdentificationLighting and HornsOpen47.Backup Lamp β€” Electrical DiagramsLighting and HornsOpen48.Charging System β€” Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff !Starting and ChargingOpen