Fuse box in instrument panel
The fuses (and relays) are located in the central electrical unit behind the ashtray in the center console.
| Position | Function | Ampere rating [A] |
| 1 | Fuel pump (main), engine control systems | 25 |
| 2 | Central locking, hazard warning flashers, headlight flashers | 25 |
| 3 | Power seats | 30 |
| 4 | Brake lights | 15 |
| 5 | Glove compartment light, clock, audio system, interior light, trunk light, door open warning, antenna, vanity mirror lights | 15 |
| 6 | Blower – climate control unit | 30 |
| 7 | Front fog lights | 30 |
| 8 | Electrically operated windows | 30 |
| 9 | Warning light, seat belt, turn signals, heated front seats, electrically-operated windows, shift-lock | 15 |
| 10 | Heated rear window power sunroof heated side-view mirrors | 30 |
| 11 | Fuel pump (tank), heated oxygen sensor | 15 |
| 12 | Back-up lights, cruise control, disengagement of 4th gear on automatic transmission | 15 |
| 13 | Spare | — |
| 14 | Electrically-operated side view mirrors, cigarette lighter, radio, rear wiper/washer (wagon), ambient temperature sensor | 15 |
| 15 | Horn, windshield wash/wipe, power seats | 25 |
| 16 | Blower – climate control unit | 30 |
| 17 | High beam (left) | 15 |
| 18 | High beam (right) | 15 |
| 19 | Low beam (left), relay – fog light(s) | 15 |
| 20 | Low beam (right) | 15 |
| 21 | LH parking lights (front and rear), license plate light, light for: ash tray, heater, control panel, switch for heated rear window | 15 |
| 22 | RH parking lights (front and rear), center console compartment, lighting for: heated seat switch, gear selector panel, rear ash tray | 15 |
| 23 | Heated front seats | 25 |
| 24 | ABS | 15 |
| 25 | Rear fog light | 25 |
| 26 | Audio system | 15 |
| R | Spare fuses | — |
Volvo 940 – fuse box diagram
| Number | Description |
| 1/1 | Battery |
| 2/2 | Relay, front foglights |
| 2/3 | Regulator DIM-DIP |
| 2/4 | Intermittent relay, windshield wipers |
| 2/5 | Relay, seat belt reminder/ignition key warning |
| 2/6 | Bypass relay 151 |
| 2/7 | Central locking relay |
| 2/8 | Overdrive relay |
| 2/10 | Power unit ECC |
| 2/11 | Relay, engine cooling fan |
| 2/12 | Relay, radio interference suppression |
| 2/13 | Relay, fuel injection (MFI) |
| 2/14 | Relay, glowplug mechanism |
| 2/15 | Relay, exhaust gas temperature sensor |
| 2/16 | Tailgate intennittent wiper relay |
| 2/23 | Relay, fuel injection |
| 2/34 | Relay, front foglights |
| 2/36 | Headlight flasher |
| 2/37 | Headlight relay |
| 2/38 | Timer relay, exhaust gas recirculation {EGR) |
| 2/45 | Relay, P-shift lock |
| 2/50 | Bypass relay, high beam |
| 3/1 | Ignition lock |
| 3/2 | Light switch |
| 3/4 | Cruise control operation |
| 3/5 | Switch, tum signal/high·low beam |
| 3/6 | Switch, hazard warning flashers |
| 3/7 | Foglight switch. |
| 3/8-1 | Switch, heated rear window |
| 3/8-2 | Switch with timer relay, heated rear window/door mirrors |
| 3/9 | Brake light switch |
| 3/10 | Backup (reversing) light switch |
| 3/12 | Switch, windshield wash/wipe |
| 3/13 | Switch, tailgate wash/wipe |
| 3/14 | Switch, lock button |
| 3/15 | Power window switch, driver’s door for driver’s door |
| 3/16 | Power window switch, driver’s door for driver’s side rear door |
| 3/17 | Power window switch, driver’s door for passenger’s side front |
| 3/18 | Power window switch, driver’s door for passenger’s side rear |
| 3/19 | Power window switch, driver’s side rear |
| 3/20 | Power window switch, passenger’s side front |
| 3/21 | Power window switch, passenger’s side rear |
| 3/22 | Switch for rear power window lifts |
| 3/23 | Switch for power door mirror, driver’s side |
| 3/24 | Switch for power door mirror, passenger’s side |
| 3/25 | Switch for power sunroof |
| 3/26 | Operating module, driver’s scat |
| 3/27 | Operating module, passenger’s seat |
| 3/28 | Switch for heated driver’s scat |
| 3/29 | Switch for heated passenger’s seat |
| 3/31 | Door switch, driver’s door |
| 3/32 | Door switch, passenger’s side front |
| 3/33 | Door switch, driver’s side rear |
| 3/34 | Door switch, passenger’s side rear |
| 3/35 | Door switch, tailgate (5-door estate) |
| 3/36 | Switch, glove compartment |
| 3/37 | Hom contacts |
| 3/38 | Switch, brake pedal |
| 3/39 | Switch, clutch pedal |
| 3/40 | Start inhibit switch, automatic transmission |
| 3/42-1 | Switch on transmission |
| 3/42-2 | Oil preSSUTc sensor, kick-down va}ve |
| 3/43 | Switch in gear lever |
| 3/44 | Seat belt lock, driver’s seat |
| 3/47 | Parking brake switch |
| 3/50 | Thronle position (TP) switch |
| 3/52 | Switch for power antenna |
| 3/59 | Beam width control |
| 3/66 | Idle air conrro1 (lAC) control, EGR |
| 3/70 | Rheostat setting |
| 3/78 | Lock unit, tailgate |
| 4/1 | Overheating protector, driver’s seat |
| 4/2 | Overheating protector, passenger’s scat |
| 4/3 | Conrrol module, cruise control |
| 4/4 | Rheostat |
| 4/5 | Safety circuit, SRS (airbag) |
| 4/6 | Control module, ECC |
| 4/9 | Sensor module, SRS (airbag) |
| 4/10 | Control module EZ-K (Dl) system |
| 4/15 | Power amplifier, EZ-K (Dl) system |
| 4/16 | Control module ABS |
| 4/23 | Control module LH-jetronic 2.4 (MFI) system |
| 4/25 | Control module Regina (MFI) system |
| 4/26 | Power amplifier/ignition coil REX-I (DI) system |
| 4/29 | Control module driver’s seat |
| 4/40 | A/C contmls, MCC |
| 4/42 | Control module REX-I (Dl) system |
| 4/43 | Heater controls |
| 5/1 | Combined instrument |
| 5/3 | Ambient temperature sensor |
| 6/1 | Windshield wiper motor |
| 6/2 | Washer motor, from |
| 6/3 | Right headlight wiper motor |
| 6/4 | Left headlight wiper motor |
| 6/5 | Central locking motor, passenger’s side front |
| 6/6 | Central locking motor, passenger’s side rear |
| 6/7 | Central locking motor, driver’s side rear |
| 6/8 | Central locking motor, tailgate |
| 6/9 | Window lift mOlor driver’s door |
| 6/10 | Window lift motor driver’s side rear |
| 6/11 | Window lift motor passenger’s side front |
| 6/12 | Window lift motor passenger’s side rear |
| 6/13 | Power door mirror. driver’s side |
| 6/14 | Power door mirror. passenger’s side |
| 6/15 | Motor. po·wcr sunroof |
| 6/16 | Motor, driver’s seat backrest |
| 6/17 | Motor, up-down, front edge of driver’s seat |
| 6/18 | Motor, up-down, rear edge of driver’s seat |
| 6/19 | Motor, fore-aft, driver’s seat |
| 6/24 | Vacuum pump, cruise control |
| 6/25 | Starter motor |
| 6/26 | Generator |
| 6/27 | Servo motor, throulc control |
| 6/28 | Cabin fan motor |
| 6/29 | Engine co.oling fan |
| 6/30 | Washer motor, tailgate |
| 6/31 | Fuel pump |
| 6/32 | Tailgate wiper motor |
| 6/33-1 | Fuel level sensor/primer pump |
| 6/33-2 | Fucllcvcl sensor/pump |
| 6/34 | Power antenna |
| 6/35 | Parking heater |
| 6/36 | Central locking motor, driver’s side front |
| 6/38 | Actuator. left |
| 6/39 | Acruator, right |
| 7/4 | Brake fluid level sensor |
| 7/5 | Washer fluid level sensor |
| 7/6 | Oil pressure sensor |
| 7/7 | Engine coolant temperature (ECT) sensor |
| 7/9 | Engine co-olant temperature (ECT) sensor, ECC |
| 7/10 | Cabin temperature sensor |
| 7/11 | Ambient temperature sensor |
| 7/12 | Solar sensor |
| 7/14 | Thermostat, engine cooling fan |
| 7/15 | Heated oxygen sensor (H02S) |
| 7/16 | Engine coolant temperature (ECT) sensor, fuel/ignition (MFI/Dl) system |
| 7/17 | Mass air flow (MAF) sensor |
| 7/24 | Knock sensor (KS) |
| 7/25 | Engine speed (RPM) sensor |
| 7/26 | Pressure s.ensor, EGR |
| 7/28 | Engine coolant temperature (ECT) sensor, diesel |
| 7/30 | Pressure sensor for charge pressure, turbodiesel |
| 7/31 | Sensor, ABS left front |
| 7/32 | Sensor, ABS right front |
| 7/33 | Sensor, vehicle speed (VSS) and ABS |
| 7/34 | Thermoelement, three-way catalytic converter (fWC) |
| 7/37 | Temperature sensor, EGR |
| 7/38 | Low-speed pressure sensor, engine cooling fan |
| 7/40 | High-speed pressure sensor, engine cooling fan |
| 7/41 | High-pres.sure sensor, NC |
| 7/43 | Thermostat, driver’s seat |
| 7/44 | Thermostat, passenger’s seat |
| 7/47 | PTC-resis’lor, air pre-heating |
| 7/50 | Pressure sensor, intake manifold |
| 7/52 | Temperature sensor, intake air |
| 7/53 | Low-pressure sensor, A/C |
| 7/69 | Ambient temperature sensor |
| 7/75 | Bulb malfunction indicator |
| 8/1 | Operating solenoid, overdrive |
| 8/2 | Solenoids, ECC |
| 8/3 | Sole110id coupling, A/C |
| 8/5 | Idle air control (lAC) valve |
| 8/6-9 | Injection valves |
| 8/13 | Fuel valve, diesel |
| 8/15 | Hydraulic unit, ABS |
| 8/17 | Converter, EGR |
| 8/24 | 3-way valve, EGR |
| 8/30 | Steering wheel module, SRS (airbag) |
| 8/33 | Igniter for left seat belt tensioner |
| 8/34 | Igniter for right seat belt tensioner |
| 8/36 | Solenoid P-shift lock |
| 8/42 | Solenoid, pulsed secondary air injection (PAIR) |
| 9/1 | Cigar lighter |
| 9/2 | Heated rear window |
| 9/3 | Heater element, driver’s seat baclcrest |
| 9/4 | Heater element, passenger’s seat backrest |
| 9/5 | Heater element, driver’s seat cushion |
| 9/6 | Heater elemem, passenger’s seat cushion |
| 10/5 | Left front foglight |
| 10/6 | Right front foglight |
| 10/11 | Left front parking light |
| 10/12 | Right front parking light |
| 10/13 | Left front tum signal |
| 10/14 | Right front turn signal |
| 10/15 | Left tum signal repeater (not USNCDN) |
| 10/16 | Right turn signal repeater (not USNCDN) |
| 10/19 | Extra brake light |
| 10/20 | Left number plate light |
| 10/21 | Right number plate light |
| 10/22 | Roof light |
| 10/24 | Trunk light |
| 10/25 | Roof light, load area (5-door) |
| 10/29 | Glove compartment light |
| 10/30 | Door-0pen warning light, driver’s door |
| 10/31 | Door-open warning light, front passenger’s side |
| 10/32 | Door-open warning light, rear driver’s side |
| 10/33 | Door-0pen warning light, rear passenger’s side |
| 10/36 | Control panel lighting |
| 10/38 | Ashtray lighting, rear |
| 10/39 | Switch lighting, seat heater |
| 10/40 | Gear selector lighting |
| 10/43 | Right brake light |
| 10/44 | Right parking light. rear |
| 10/45 | Right parking/tail light |
| 10/46 | Right rear foglight |
| 10/47 | Bulb, right rear turn signal |
| 10/48 | Right backup (reversing) light |
| 10/50 | Left brake light |
| 10/51 | Left parking light, rear |
| 10/52 | Left parking/tail light |
| 10/53 | Left rear foglight |
| 10/54 | Bulb, left rear tum signal |
| 10/55 | Left backup (reversing) light |
| 10/64 | Right high beam |
| 10/65 | Right extra high beam |
| 10/66 | Right low beam |
| 10/68 | Left high beam |
| 10/69 | Left extra high beam |
| 10/70 | Left low beam |
| 10/72 | Ashtray lighting, front |
| 10/74 | Indicator light. exhaust gas temperature |
| 10/75 | Indicator light, charge pressure, turbodiesel |
| 10/76 | Indicator light, diesel preheating |
| 10/77 | Indicator light, SRS (airbag) |
| 10/78 | Indicator light, seat belt |
| 10/79 | Indicator light, overdrive (auto.)/Gear selection indicator |
| 10/80 | Indicator light, overdrive (man.) |
| 10/82 | Indicator light, ABS |
| 10/83 | Indicator light, parking brake |
| 10/84 | Indicator light, brake warning |
| 10/85 | Indicator light, high beam |
| 10/86 | Indicator light, oil pressure |
| 10/87 | Indicator light, charge |
| 10/88 | Indicator light, bulb failure |
| 10/89 | Indicator light, rear fog lights |
| 10/90 | Indicator light, washer fluid level |
| 10/91 | Service indicator |
| 10/92 | Indicator light, trailer |
| 10/93 | Indicator light, malfunction indicator lamp (MIL) |
| 10/94 | Indicator light, right turn signal |
| 10/95 | Indicator light, left turn signal |
| 10/96 | Instrument lighting |
| 10/103 | Switch lighting, heated rear window/door mirrors |
| 10/104 | Switch lighting |
| 10/114 | Vanity mirror lighting, passenger’s side |
| 10/115 | Vanity mirror lighting, driver’s side |
| 11/1-26 | Fuses |
| 11/41 | Fuse, combined instrument |
| 15/1 | Positive terminal |
| 15/2 | 30-rail in el. distribution unit |
| 15/9 | Fuse-protected 15-rail in el. distribution unit |
| 16/1 | Radio |
| 16/2 | Amplifier |
| 16/3 | Loudspeaker, right front door |
| 16/4 | Loudspeaker, left front door |
| 16/5 | Loudspeaker, right rear door |
| 16/6 | Loudspeaker, left rear door |
| 16/7 | Loudspeaker, instrument panel, right side |
| 16/8 | Loudspeaker, instrument panel, left side |
| 16/9 | Antenna |
| 16/10 | Hom 1 |
| 16/11 | Hom 2 |
| 16/15 | CD-autochanger |
| 16/17 | Loudspeaker, rear parcel shelf, left side/left 0-post |
| 16/18 | Loudspeaker, rear parcel shelf, right side/right D-post |
| 17/1 | Service data link connector for staner motor operation |
| 17/11 | OBD data link connector |
| 17/14 | Data link connector for diagnosis of power seat |
| 18/1 | Bridge connector 1 COMPONENT IDENTIFICATION |
| 18/2 | Bridge connector 2 |
| 19/1 | Engine coolant temperature (ECT) gauge |
| 19/2 | Rev. counter (RPM gauge) |
| 19/3 | Speedometer |
| 19/4 | Clock |
| 19/5 | Fuel gauge |
| 20/1 | Ignition coil |
| 20/2 | Distributor |
| 20/3-6 | Spark plugs |
| 20/9 | Glowplugs |
| 20/15 | Series resistance |
| 20/18 | Cabin fan resistor |
| 31/1 | Ground connector right front wing |
| 31/2 | Ground connector left front wing |
| 31/3 | Ground connector body (ground connection, battery-body) |
| 31/4 | Ground connector engine (ground connection, battery-engine) |
| 31/5 | Ground connector for heated rear window (4-door) |
| 31/6 | Ground connector left A-post |
| 31/9 | Ground connector at parking brake lever |
| 31/10 | Ground connector right A-post |
| 31/11 | Ground connector left taillight |
| 31/12 | Ground connector right tail light |
| 31/13 | Ground connector in load area |
| 31/16 | Ground connector at windshield wiper motor |
| 31/17 | Ground connector at power sunroof motor |
| 31/26 | Ground connector, generator |
| 31/28 | Ground connector at overdrive solenoid |
| 31/31 | Ground connection rail incl. distribution unit |
| 31/32 | Ground connector on engine (power ground) |
| 31/33 | Ground connector on engine (signal ground) |
| 31/60 | Ground connector on engine (diesel) |
| 31/63 | Ground connector at steering column bracket |
| 31/64 | Ground connector engine cooling fan |
| C1 | Connector, 53-pin, Instrument panel harness – Door sill harness |
| C2 | Connector, 53-pin, Instrumnent panel harness – Left wheel housing harness |
| C3 | Connector, 53-pin, Instrument panel harness – Right wheel housing harness |
| C5 | Connector, left A-post, 2-pin |
| C6 | Connector. at el. dist. unit. 4-pin |
| C7 | Connector, at steering colwnn, 8-pin |
| C9 | Connector, at centre console, 10-pin |
| C11 | Connector. at el. dist. unit, 4-pin |
| C12 | Connector, at el. dist. unit, 2-pin |
| C14 | Connector, at el. dist. unit. 2-pin |
| C15 | Connector, left A-post, 4-pin |
| C19 | Connector, at instrument panel, 2-pin |
| C20 | Connector. under gear lever carrier. 1-pin or 2-pin |
| C21 | Connector, left B-post, 4-pin |
| C22 | Connector. at tailgate. 6-pin (5-door) |
| C23 | Connector, at tailgate, 2-pin (5-door) |
| C24 | Connector, at extra brake light, 2-pin |
| C25 | Connector, tailgate, 2-pin, (5-door) |
| C27 | Connector, tailgate, 1-pin, (5-door) |
| C29 | Connector, at drive(s seat, 4-pin |
| C31 | Connector. at passenger’s scat, 2-pin |
| C32 | Connector, at driver’s scat, 2-pin |
| C33 | Connector, under driver’s scat, 2-pin |
| C34 | Connector, under passenger’s scat, 2-pin |
| C36 | Connector, under passenger’s scat, 2-pin |
| C37 | Connector, under driver’s scat, 2-pin |
| C39 | Connector. at driver’s seat, 4-pin |
| C40 | Connector, at passenger’s seat, 4-pin |
| C41 | Connector, under driver’s seat, 6-pin |
| C42 | Connector, under driver’s seat, 2-pin |
| C50 | Connector. 8-pin, Left wheel housing harness – Engine harness |
| C51 | Connector, 8-pin, Left wheel housing harness – Engine harness |
| C54 | Connector. 8-pin, Right wheel housing harness – Engine harness |
| C55 | Connector, 8-pin, Right wheel housing harness Engine harness |
| C62 | Connector, at windshield wiper motor, 4-pin |
| C63 | Connector, at left headlight. 3-pin |
| C64 | Connector, at right headlight, 3-pin |
| C65 | Connector, driver’s door, 6-pin |
| C66 | Connector, passenger’s door. 6-pin |
| C72 | Connector, driver’s door, 2-pin |
| C73 | Connector, passenger’s door. 2-pin |
| C74 | Connector, rear door driver’s side, 2-pin |
| C75 | Connector, rear door passenger’s side, 2-pin |
| C76 | Connector, right A-post, 2-pin |
| C79 | Connector, driver’s door, 4-pin |
| C84 | Connector, driver’s door, 2-pin |
| C85 | Connector, rear door driver’s side, 2-pin |
| C86 | Connector, passenger’s door, 2-pin |
| C87 | Connector, rear door passenger’s side, 2-pin |
| C88 | Connector, at switch, 5-pin |
| C89 | Connector. at sunroof motor, 2-pin |
| C91 | Connector, at eL dist. unit, 2-pin |
| C92 | Connector. behind steering wheel, 2-pin |
| C93 | Connector. left rear wheel housing, 4-pin |
| C98 | Connector. at power antenna. 4-pin |
| C100 | Connector. left wheel housing, 2-pin |
| C101 | Connector, right wheel housing. 2-pin |
| C102 | Connector. at el. dist. unit, 2-pin |
| C105 | Connector on bridge connector 1, 2-pin |
| C111 | Connector. at thennoelemcnt, 2-pin |
| C117 | Connector, 2-pin, Left wheel housing harness . Engine harness |
| C121 | Coupling reel, steering wheel, SRS (airbag) |
| C123 | Connector to bridge connector 2, 2-pin |
| C132 | Connector, 8-pin, Left wheel housing harness – Engine harness |
| C137 | Connector, 4-pin, Right wheel housing harness – Engine harness |
| C139 | Connector, at gear selector, 4-pin |
| C143 | Connector, at A-post passenger’s side, 24-pin |
| C144 | Connector, at A-post driver’s side, 24-pin |
| C149 | Connector, at B-post passenger’s side, 11-pin |
| C150 | Connector, at B-post driver’s side, 11-pin |
| C154 | Connector, 3-pin or ! -pin, Right wheel housing harness -engine cooling fan harness |
| C155 | Connector, left A-post, 8-pin |
| C156 | Connector. at firewall, 3-pin |
| C157 | Connector, at el. dist. unit, 4-pin |
| C158 | Connector. at driver’s scat, 4-pin |
| C160 | Connector, at inst.rument panel, 6-pin |
| C161 | Connector. at ftrewall, 1-pin |
| C162 | Connector, left B-post, 2-pin |
| C163 | Connector. at ftrewall. 2-pin (diesel) |
| C166 | Connector, at el. dist. unit, 8-pin |
| C300 | Connector, at ftrewall, 4-pin (for heated oxygen sensor (H02S)) |
| C301 | Connector, at instrument panel for vanity mirror, passenger’s side |
| C302 | Connector, at instrument panel for vanity mirror, driver’s side |
| D1 | Connector. at instrument panel, 4-pin |
| D2 | Connector, alann, 8-pin at steering column |
| D3 | Connector, alann, 4-pin at steering column |
| D4 | Connector, alarm. 2-pin in engine compartment, left front |
| D5 | Connector, towing hook. 10-pin (not USA/CON) |
| D7 | Connector, ambient temperature sensor, 6-pin |
WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.