Wiring Diagram Cluster

1990 BMW 325is Body Electrical Wiring Diagram

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

Open Exact Vehicle Repair HubOpen Interactive Diagram BrowserBrowse All Wiring Diagrams

Matched Diagrams

48

Variant Used

325is (E30) L6-2494cc 2.5L SOHC (M20)

Total Vehicle Diagrams

1123

🤖 Stuck on this electrical issue?

Wiring diagrams can be a maze. Ask Manuel, our factory-trained AI mechanic, to analyze this circuit or troubleshoot your specific symptom.

Ask AI Mechanic ➔

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 BMW 325is hub with repairs, specs, codes, and other systems already tied to this car.

View vehicle repair hub →
1990 BMW 325is 50-Amp Clamp For Gt1 (04 16 04)

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 BMW 325is 50-Amp Clamp For Gt1 (04 16 04) →
1990 BMW 325is 50-Amp Clamp For Gt1 (04 16 04)1990 BMW 325is 88-Pin Universal Adapter (04 14 90 (3114))1990 BMW 325is 88-Pin Universal Adapter (04 14 90 (3114))

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.Electrical Diagrams > Lighting and Horns > Marker Lamp > License, Rear Marker & Trunk LampsGeneralOpen2.Electrical Diagrams > Lighting and Horns > System Diagram > Lighting > License, Rear Marker & Trunk LampsGeneralOpen3.Electrical Diagrams > Lighting and Horns > Trunk LampGeneralOpen4.Electrical Diagrams > HornsLighting and HornsOpen5.Electrical Diagrams > Lighting > License, Rear Marker & Trunk LampsLighting and HornsOpen6.Horn — Diagnostic Aids > Troubleshooting ProceduresLighting and HornsOpen7.Horn — Diagnostic Aids > Troubleshooting Tests > Continuity TestLighting and HornsOpen8.Horn — Diagnostic Aids > Troubleshooting Tests > Current Test Using AmmeterLighting and HornsOpen9.Horn — Diagnostic Aids > Troubleshooting Tests > Short Test Using OhmmeterLighting and HornsOpen10.Horn — Diagnostic Aids > Troubleshooting Tests > Short Test Using VoltmeterLighting and HornsOpen11.Horn — Diagnostic Aids > Troubleshooting Tests > Voltage Drop TestLighting and HornsOpen12.Horn — Diagnostic Aids > Troubleshooting Tests > Voltage TestLighting and HornsOpen13.Horn — Diagnostic Aids > Troubleshooting ToolsLighting and HornsOpen14.Horn — Diagram Information and Instructions > Component ID (General List) > Part 1 ALighting and HornsOpen15.Horn — Diagram Information and Instructions > Component ID (General List) > Part 2 BLighting and HornsOpen16.Horn — Diagram Information and Instructions > Component ID (General List) > Part 3 C-GLighting and HornsOpen17.Horn — Diagram Information and Instructions > Component ID (General List) > Part 4 H-MLighting and HornsOpen18.Horn — Diagram Information and Instructions > Component ID (General List) > Part 5 N-ZLighting and HornsOpen19.Horn — Diagram Information and Instructions > Symbol Identification and Diagram InformationLighting and HornsOpen20.Horn — Diagram Information and Instructions > Wire Color Code IdentificationLighting and HornsOpen21.Horn — Electrical DiagramsLighting and HornsOpen22.Locks > Door Locks — Diagnostic Aids > Troubleshooting ProceduresBody and FrameOpen23.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Continuity TestBody and FrameOpen24.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Current Test Using AmmeterBody and FrameOpen25.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Short Test Using OhmmeterBody and FrameOpen26.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Short Test Using VoltmeterBody and FrameOpen27.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Voltage Drop TestBody and FrameOpen28.Locks > Door Locks — Diagnostic Aids > Troubleshooting Tests > Voltage TestBody and FrameOpen29.Locks > Door Locks — Diagnostic Aids > Troubleshooting ToolsBody and FrameOpen30.Locks > Door Locks — Diagram Information and Instructions > Component ID (General List) > Part 1 ABody and FrameOpen31.Locks > Door Locks — Diagram Information and Instructions > Component ID (General List) > Part 2 BBody and FrameOpen32.Locks > Door Locks — Diagram Information and Instructions > Component ID (General List) > Part 3 C-GBody and FrameOpen33.Locks > Door Locks — Diagram Information and Instructions > Component ID (General List) > Part 4 H-MBody and FrameOpen34.Locks > Door Locks — Diagram Information and Instructions > Component ID (General List) > Part 5 N-ZBody and FrameOpen35.Locks > Door Locks — Diagram Information and Instructions > Symbol Identification and Diagram InformationBody and FrameOpen36.Locks > Door Locks — Diagram Information and Instructions > Wire Color Code IdentificationBody and FrameOpen37.Locks > Door Locks — Electrical DiagramsBody and FrameOpen38.Connector Views > Connector Views/Pin Assignments > ABS Control Unit ... Central LockingGeneralOpen39.Electrical Diagrams > Lighting and Horns > Backup LampGeneralOpen40.Electrical Diagrams > Lighting and Horns > Brake LampGeneralOpen41.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > Glove Box LampGeneralOpen42.Electrical Diagrams > Lighting and Horns > Courtesy Lamp > System DiagramGeneralOpen43.Electrical Diagrams > Lighting and Horns > FlashlightGeneralOpen44.Electrical Diagrams > Lighting and Horns > Fog/Driving LampGeneralOpen45.Electrical Diagrams > Lighting and Horns > Hazard Warning LampsGeneralOpen46.Electrical Diagrams > Lighting and Horns > Headlamp > Headlamp SwitchGeneralOpen47.Electrical Diagrams > Lighting and Horns > Headlamp > System DiagramGeneralOpen48.Electrical Diagrams > Lighting and Horns > HornGeneralOpen

Parts & Tools for This Job

Common parts shoppers buy for 1990 BMW 325is Body Electrical.

part

Assorted Fuses

Shop Amazon→

part

Relays

Shop Amazon→

tool

Digital Multimeter

Shop Amazon→

tool

Wire Repair Kit

Shop Amazon→

As an Amazon Associate, AllOEMManuals earns from qualifying purchases. Prices and availability may vary.

Exact Vehicle Hub

Browse →
1990 Bmw 325is Repair HubExact Vehicle · Backbone

Open the exact vehicle hub for this wiring page to move into repair, manual, and code clusters without leaving the 1990 Bmw 325is context.

OEM Manual Evidence

Browse →
1990 BMW 325is 50-Amp Clamp For Gt1 (04 16 04)OEM Manual

50-Amp Clamp For Gt1 (04 16 04) — 1990 BMW 325is Automatic Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >...

1990 BMW 325is 50-Amp Clamp For Gt1 (04 16 04)OEM Manual

50-Amp Clamp For Gt1 (04 16 04) — 1990 BMW 325is Standard Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimagined Home >>...

1990 BMW 325is 88-Pin Universal Adapter (04 14 90 (3114))OEM Manual

88-Pin Universal Adapter (04 14 90 (3114)) — 1990 BMW 325is Automatic Service Manual ~ LEMON Manuals LEMON Manuals: Repair Knowledge Reimag...

1990 BMW 325is 88-Pin Universal Adapter (04 14 90 (3114))OEM Manual

88-Pin Universal Adapter (04 14 90 (3114)) — 1990 BMW 325is Automatic 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 325is Wiring Pages

Starter Wiring DiagramAlternator Wiring DiagramHeadlight Wiring DiagramABS Brake Wiring DiagramA/C & Heater Wiring DiagramPower Window Wiring DiagramInstrument Cluster Wiring DiagramWiper & Washer Wiring DiagramTransmission Wiring DiagramCruise Control Wiring DiagramAirbag SRS Wiring DiagramEngine Management Wiring Diagram

Same System, Other Vehicles

1989 BMW 635CSi Body Electrical Wiring Diagram1989 BMW L6 Body Electrical Wiring Diagram1992 BMW 318i Body Electrical Wiring Diagram1992 BMW 325i Body Electrical Wiring Diagram1992 BMW 325i Convertible Body Electrical Wiring Diagram1992 BMW 325is Body Electrical Wiring Diagram1992 BMW 525i Body Electrical Wiring Diagram1992 BMW 535i Body Electrical Wiring Diagram
Factory Service Tools

Turn This Into a Confident Next Step

Verify the likely fault first, then compare a quote before you approve expensive work.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Diagnostic ToolsCompare Repair QuoteQuote Shield Pro
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro