Wiring Diagram Cluster

1991 Audi 90 Quattro 20V Body Electrical Wiring Diagram

Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.

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Matched Diagrams

48

Variant Used

90 Quattro 20V L5-2309cc 2.3L DOHC (7A)

Total Vehicle Diagrams

1113

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1991 Audi 90 Quattro 20V Basic Electricity

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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 Audi 90 Quattro 20V Basic Electricity →
1991 Audi 90 Quattro 20V Basic Electricity1991 Audi 90 Quattro 20V Basic Electricity1991 Audi 90 Quattro 20V Basic Electricity

Diagnostic signal

Codes Often Seen With This System

Use the code cluster when wiring faults overlap with check-engine or module-level diagnostics.

B1318: Battery Voltage Low →
U0140: Lost Communication with Body Control Module

Top Body Electrical Diagram Paths

1.Doors, Hood and Trunk > Doors > Front Door — DiagramBody and FrameOpen2.Horn — Diagnostic Aids > Basic ElectricityLighting and HornsOpen3.Horn — Diagnostic Aids > Checking For Short Circuit to GroundLighting and HornsOpen4.Horn — Diagnostic Aids > Checking For VoltageLighting and HornsOpen5.Horn — Diagnostic Aids > Checking Ground ConnectionsLighting and HornsOpen6.Horn — Diagnostic Aids > Checking Wiring and ComponentsLighting and HornsOpen7.Horn — Diagnostic Aids > Trouble Shooting ProcedureLighting and HornsOpen8.Horn — Diagnostic Aids > Working on the Electrical SystemLighting and HornsOpen9.Horn — Diagram Information and Instructions > Connector IndexLighting and HornsOpen10.Horn — Diagram Information and Instructions > General Information > Circuit SectionsLighting and HornsOpen11.Horn — Diagram Information and Instructions > General Information > Handling Components and ConnectorsLighting and HornsOpen12.Horn — Diagram Information and Instructions > Ground ConnectionsLighting and HornsOpen13.Horn — Diagram Information and Instructions > How to Read Displayed Page of Wiring Diagram, Important Stuff!Lighting and HornsOpen14.Horn — Diagram Information and Instructions > Positive (+) ConnectionsLighting and HornsOpen15.Horn — Diagram Information and Instructions > Symbols Used in Wiring DiagramsLighting and HornsOpen16.Horn — Diagram Information and Instructions > Understanding Track Style Wiring Diagrams, Important Stuff!Lighting and HornsOpen17.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen18.Horn — Diagram Information and Instructions > Wire Size ConversionLighting and HornsOpen19.Horn — Diagram Information and Instructions > Wiring Diagram Circuit IdentificationLighting and HornsOpen20.Horn — Electrical DiagramsLighting and HornsOpen21.Locks > Door Locks — DiagramBody and FrameOpen22.Electrical Diagrams > Antitheft and Alarm Systems > Alarm HornGeneralOpen23.Electrical Diagrams > Door Lock HeaterGeneralOpen24.Electrical Diagrams > Lighting and Horns > Backup LampGeneralOpen25.Electrical Diagrams > Lighting and Horns > Brake LampGeneralOpen26.Electrical Diagrams > Lighting and Horns > Daytime Running LampGeneralOpen27.Electrical Diagrams > Lighting and Horns > Dome LampGeneralOpen28.Electrical Diagrams > Lighting and Horns > Fog/Driving LampGeneralOpen29.Electrical Diagrams > Lighting and Horns > Glove Box LampGeneralOpen30.Electrical Diagrams > Lighting and Horns > Hazard Warning LampsGeneralOpen31.Electrical Diagrams > Lighting and Horns > HeadlampGeneralOpen32.Electrical Diagrams > Lighting and Horns > HornGeneralOpen33.Electrical Diagrams > Lighting and Horns > License Plate LampGeneralOpen34.Electrical Diagrams > Lighting and Horns > Marker LampGeneralOpen35.Electrical Diagrams > Lighting and Horns > System DiagramGeneralOpen36.Electrical Diagrams > Lighting and Horns > Tail LampGeneralOpen37.Electrical Diagrams > Lighting and Horns > Turn SignalsGeneralOpen38.Electrical Diagrams > Power Locks > Power Door Lock ActuatorGeneralOpen39.Electrical Diagrams > Power Locks > Power Door Lock SwitchGeneralOpen40.Exploded Views > Door LocksGeneralOpen41.Backup Lamp — Diagnostic Aids > Basic ElectricityLighting and HornsOpen42.Backup Lamp — Diagnostic Aids > Checking For Short Circuit to GroundLighting and HornsOpen43.Backup Lamp — Diagnostic Aids > Checking For VoltageLighting and HornsOpen44.Backup Lamp — Diagnostic Aids > Checking Ground ConnectionsLighting and HornsOpen45.Backup Lamp — Diagnostic Aids > Checking Wiring and ComponentsLighting and HornsOpen46.Backup Lamp — Diagnostic Aids > Trouble Shooting ProcedureLighting and HornsOpen47.Backup Lamp — Diagnostic Aids > Working on the Electrical SystemLighting and HornsOpen48.Backup Lamp — Diagram Information and Instructions > Connector IndexLighting and HornsOpen

Parts & Tools for This Job

Common parts shoppers buy for 1991 Audi 90 Quattro 20V Body Electrical.

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Assorted Fuses

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Relays

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Digital Multimeter

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Wire Repair Kit

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1991 Audi 90-quattro-20v Repair HubExact Vehicle · Backbone

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OEM Manual Evidence

Browse →
1991 Audi 90 Quattro 20V Basic ElectricityOEM Manual

Basic Electricity — 1991 Audi 90 Quattro 20V L5-2309cc 2.3L DOHC (7A) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...

1991 Audi 90 Quattro 20V Basic ElectricityOEM Manual

Basic Electricity — 1991 Audi 90 Quattro 20V L5-2309cc 2.3L DOHC (7A) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...

1991 Audi 90 Quattro 20V Basic ElectricityOEM Manual

Basic Electricity — 1991 Audi 90 Quattro 20V L5-2309cc 2.3L DOHC (7A) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...

1991 Audi 90 Quattro 20V Basic ElectricityOEM Manual

Basic Electricity — 1991 Audi 90 Quattro 20V L5-2309cc 2.3L DOHC (7A) Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...

Likely Trouble Codes for This System

Browse →
B1318: Battery Voltage LowCode

Body/Electrical code commonly seen during body electrical diagnosis.

U0140: Lost Communication with Body Control ModuleCode

Network/Communication code commonly seen during body electrical diagnosis.

More 90 Quattro 20V Wiring Pages

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Same System, Other Vehicles

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