Wiring Diagram Cluster
2001 Volvo S40 Body Electrical Wiring Diagram
Find body control module wiring, door lock circuits, interior lighting paths, and horn/alarm schematics.
Matched Diagrams
48
Variant Used
S40 L4-1.9L Turbo VIN 29 B4204T3
Total Vehicle Diagrams
12001
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.
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Vehicle Repair Hub
Step out of raw diagrams and into the full 2001 Volvo S40 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.
Open interactive browser →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 →Top Body Electrical Diagram Paths
1.Horn — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen2.Locks > Keyless Entry — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBody and FrameOpen3.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateAccessories and Optional EquipmentOpen4.Backup Lamp — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen5.Courtesy Lamp — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen6.Fog/Driving Lamp — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen7.Hazard Warning Lamps — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen8.Headlamp — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen9.Horn — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen10.Locks > Keyless Entry — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateBody and FrameOpen11.Locks > Power Locks — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBody and FrameOpen12.Mirrors — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBody and FrameOpen13.Roof and Associated Components > Sunroof / Moonroof — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBody and FrameOpen14.Seats — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBody and FrameOpen15.Turn Signals — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateLighting and HornsOpen16.Antilock Brakes / Traction Control Systems — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateBrakes and Traction ControlOpen17.Antitheft and Alarm Systems — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateAccessories and Optional EquipmentOpen18.Antitheft and Alarm Systems > Keyless Entry — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateAccessories and Optional EquipmentOpen19.Cigarette Lighter — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateInstrument Panel, Gauges and Warning IndicatorsOpen20.Components > Central Locking, Trunk Lid/TailgateGeneralOpen21.Cooling System > Radiator Cooling Fan — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateEngine, Cooling and ExhaustOpen22.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateGeneralOpen23.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateHeating and Air ConditioningOpen24.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateInstrument Panel, Gauges and Warning IndicatorsOpen25.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgatePower and Ground DistributionOpen26.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgatePowertrain ManagementOpen27.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateStarting and ChargingOpen28.Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateWiper and Washer SystemsOpen29.Heated Glass Element — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateWindows and GlassOpen30.Ignition System > Sensors and Switches - Ignition System > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgatePowertrain ManagementOpen31.Power and Ground Distribution — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateStarting and ChargingOpen32.Radio, Stereo, and Compact Disc — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateAccessories and Optional EquipmentOpen33.Sensors and Switches - Powertrain Management > Sensors and Switches - Ignition System > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgatePowertrain ManagementOpen34.Sensors and Switches - Powertrain Management > Sensors and Switches - Ignition System > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateSensors and SwitchesOpen35.Sensors and Switches - Starting and Charging > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateSensors and SwitchesOpen36.Sensors and Switches - Starting and Charging > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateStarting and ChargingOpen37.Starting System > Ignition Switch — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateStarting and ChargingOpen38.Transmission Control Systems — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgatePowertrain ManagementOpen39.Transmission Control Systems — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateTransmission and DrivetrainOpen40.Windows — Diagram Information and Instructions > Diagram Legend > 6/32 Central Locking, Trunk Lid/TailgateWindows and GlassOpen41.Backup Lamp — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen42.Courtesy Lamp — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen43.Fog/Driving Lamp — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen44.Hazard Warning Lamps — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen45.Headlamp — Diagram Information and Instructions > Diagram Legend > 10/34 Lamp Housing, Trunk Lid/TailgateLighting and HornsOpen46.Horn — Diagram Information and Instructions > Diagram Legend > 3/24 Switch, Central Locking, Driver's DoorLighting and HornsOpen47.Horn — Diagram Information and Instructions > Diagram Legend > 3/37 Switch, Central Locking, Passenger DoorLighting and HornsOpen48.Horn — Diagram Information and Instructions > Diagram Legend > 3/54 Switch, Driver's Door LockLighting and HornsOpen
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