Volvo 740 was produced in 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992. During this time, the model was updated. In this publication, we will present a description of the fuses and relays of the Volvo 740 760 with a diagram of the unit and its location. Note the fuse responsible for the cigarette lighter.
The purpose of fuses and relays may differ from that shown and depends on the year of manufacture, level of electrical equipment and region of delivery of your vehicle.
Fuse and relay box
The main block with fuses and relays is located in the passenger compartment, in the middle of the panel, behind the ashtray. To access the block, it must be removed.
Fuses
| No. | A | Description |
|---|---|---|
| 1 | 25 | ’82: Hazard warning lights, high/low beam flashing (fuses no.: “17”, “18”), central locking |
| 25 | ’83-’90: Fuel pumps, fuel injection system, LH-Jetronic/Motronic relay, ETC (’86) | |
| 25 | ’88-’91 (780): Main Fuel Pump | |
| 25 | ’91–’92 (740, 940): Fuel pumps, ignition system, fuel injection, Lambdasond heating system (B200/B230FT) | |
| 2 | 25 | ’82: Fuel Pump Relay (E and F Engines) |
| 25 | ’83–’92: Hazard warning lights, high/low beam flashing (fuses no.: “17”, “18”), central locking, ABS system (’84–’87), rear fog light (780–’88) ) | |
| 3 | 15 | Additional lights (spotlights/fog lights), front fog light, rear fog light (’83-’90), central locking (’87), low beam (780 – ’88) |
| 15 | ’91–’92 (740, 940): Power seats | |
| 4 | 15 | Brake Lights, Shift Indicator (’85-’89) (except 780 – ’88-’91), Power Tailgate (780 – ’89-’91), P-Shift Lock Solenoid (’91-’92 – 740, 940) |
| 5 | 15 | Interior Light, Clock, Vanity Mirror Light, Glove Box Light, Engine Compartment & Trunk Light, Courtesy Light, Electric Antenna, Door Open Warning Lights, Radio, ETC (’85), Seat Belt Light (’86-’89) |
| 6 | 25 | ’82-’84: Electric cooling fan, heated seats (’84-), seat belt indicator (’84-) |
| 15 | ’85: Heated front seats | |
| 30 | ’86–’89: Heated front seats | |
| 30 | 89-91 (780), 90-92 (740, 940): Electronic climate control (ECC), heater fan (ECC) | |
| 7 | 30 | ’82–’84: Electric windows |
| 25 | ’85–’89: Electric cooling fan | |
| 30 | ’88 (780): Electronic Climate Control (ECC) | |
| 30 | ’89- (780), ’90 (740): Heated front seats | |
| 30 | ’91–’92 (740, 940): front fog light, rear fog light | |
| 8 | 15 | ’82–’83: Turn signals, overdrive relay (’82–’83), constant idle speed (F engines (’83)), coast stop solenoid (carbureted engine (’83)), diesel preheat relay (’83), diesel fuel valve (’83) |
| ’84: Daytime Running Lights, Bulb Failure Sensor, Power Window + Cooling Fan Relay | ||
| 30 | ’85–’92: Electric windows | |
| 9 | 30 | ’82–’84: Rear window defroster, power sunroof, air conditioning (’84) |
| 15 | ’85–’92: Turn Signals, Seat Belt Indicator, Seat Belt Reminder (’86–’92), Heated Front Seats (’85–’85), Air Conditioning (’85–’89), Electric Cooling Fan (’90-’91), Heater Fan (’87-’89), Hot Start Valve (’87-’89), Manual Climate Control (’91), P-Shift Lock Relay (’91-’92), Key Warning (’92), Power Window and Fan Relay (’85-’89), Power Window and Heated Seats Relay (’90-’92) | |
| 10 | 25 | ’82-’83: Gauges, Backup Light, Heated Seats, Power Window Relay, Cooling Fan Relay, Oil Level Sensor, Seat Belt Reminder (’83), Exhaust Gas Temperature Sensor (’83 (Japan)), AC Relay Delay (’83), Brake Circuit Warning Sensor (’83) |
| 15 | ’84: Instruments, Reversing Light, Ignition Adjustment, Cruise Control, Oil Level Sensor, Seat Belt Reminder, Exhaust Gas Temperature Sensor, Temperature Controlled Spark Advance Relay, ABS Converter | |
| 30 | ’85–’92: Heated rear window, power sunroof, power door mirrors (heated) | |
| 11 | 25 | ’82–’83: Daytime Running Lights, Blower Motor (Speed 1), A/C Relay, Cruise Control (’83), ACC Blower Motor (’83) |
| ’84: Turn signals, overdrive relay, constant idle, glow plug relay, hot spot relay, warm start valve (carbureted engine) | ||
| 15 | ’85–’92: Fuel pump (tank pump), Lambdasond heating system (’87–’92), in-tank fuel lift pump (LH 2.4) | |
| 12 | 15 | ’82–’84: Cigarette lighter , radio, power mirrors, power driver’s seat (’84) |
| 15 | ’85-’92: Reversing Light, Cruise Control, Overdrive Relay (’86-’92), Oil Level Sensor (’85-’86), Exhaust Gas Temperature Sensor, Spark Advance Relay (’85-’86), ABS Converter (’85-’87), Trip Computer (’85), ETC (’87-’88), Automatic Transmission Disconnect (780 – ’88), Lamp Malfunction Warning with Brake Circuit Monitoring (’91-’92 – 740 & 940) | |
| 13 | 25 | ’82–’84: Horn, Windshield Washer/Wiper, Headlamp Washer/Wiper |
| 15 | ’85–’86: CIS (’85), diesel fuel valve, glow plug (diesel) | |
| 15 | ’87–’92: Fuel Valve (Diesel), Glow Plug/Automatic Pre-Glow (’87–’92 Diesel), Boost Pressure Limiter, Solenoid Carburetor (’87–’88), Hot Spot (’87–’90), Fuel Shut-Off Valve (’87-’90), Idle Air Control Valve (’87-’90), Idle Air Compensator (’87-’89), PTC Resistor (’87-’90), EGR Valve (’91-’92) | |
| 15 | ’88–’91 (780): Automatic Idle Control (Diesel), Glow Plug Assembly (Diesel), Wastegate (Turbodiesel), Electric Cooling Fan (’91) | |
| 14 | 30 | ’82–’84: Fan Motor (Speeds 2, 3, 4) |
| 15 | ’85–’92: Cigarette Lighter, Radio, Power Mirrors, Rear Wiper Intermittent Relay (’86–’92), Electronic Climate Control (780–’88–’91), Rear Reading Lamps (780–’89-’91) | |
| 15 | 15 | ’82–’84: High/Low Beam Power (’83), Fuel Tank Pump (E and F Engines, B28A) – Operates only when engine is running and during starting |
| 25 | ’85–’92: Horn, Windshield Wiper/Washer, Headlamp Wiper (’86–’92), Power Seat (’90-’92 740 & 940) | |
| 16 | 15 | ’82–’84: Rear fog light, fog lights (’83 (UK)), headlight cutout (’84) |
| 30 | ’85–’92 (except 780–’88–’91): Heater fan, air conditioning, Electronic Climate Control (ECC), Manual Climate Control (MCC) | |
| 30 | ’91 (780): Radio, front amplifier | |
| 17 | 15 | Left high beam, high beam indicator |
| 18 | 15 | Right high beam, spotlight relay (’82 (except Sweden), ’84-’85), auxiliary headlight relay (’83 (UK, US), ’86-), fog lights |
| 19 | 15 | Left low beam, fog/projector lights (’86-’92), beam length adjustment (’90-’92) |
| 20 | 15 | Right low beam, fog lamp relay (’82 (Sweden)), beam length control (’90-’92) |
| 21 | 15 | Front Ashtray Light (’82-’83), Instrument Cluster Light, Left Tail Light & Left Parking Light, License Plate Light, Door Chime (’82), Shift Lever Light (’83 (Auto)) |
| 22 | 15 | Right tail light and right side light, seat belt buckle light and rear ashtray light, gear selector light, tunnel light, fog lights and rear fog light relay, additional lights |
| 23 | 15 | ’85–’87: Power driver’s seat |
| 15 | ’88 (780): Power Seat Relay | |
| 15 | ’88–’89 (740): Daytime running lights | |
| 25 | ’90–’92 (740, 940): Heated front seats | |
| 15 | ’91 (780): Radio, rear amplifier | |
| 24 | 30 | ’88–’89 (780): Power passenger seat |
| 30 | ’90-’91 (780): Driver’s seat, passenger’s seat | |
| ’89–’92 (740, 940): SRS test socket | ||
| 25 | 15 | ’85-’92: Rear fog light, daytime running lights (’85-’87), low beam (’87-’92 – 740, 760, 940 (Dim/Dip)), Radio (740 – ’89) |
| 26 | 30 | ’85–’89: Power driver’s seat |
| 30 | ’90–’91 (780): Power passenger seat | |
| 15 | ’89–’92 (740, 940): Radio amplifier |
Fuse number 12 or 14 is responsible for the operation of the cigarette lighter.
Relay
| No. | Purpose | |
|---|---|---|
| A | Lamp failure warning sensor | |
| B | USA, Canada, Japan: Seat Belt Reminder | |
| 84–’86 (B23ET): Torque limiter | ||
| C | Intermittent wiper | |
| D | 86–’92: Erratic rear door wiper | |
| E | Fuel injection | |
| LH – Jetronic/Motoronic | ||
| F | 82: Fuel injection (pulse) | |
| 83–’89 (Japan): Exhaust Gas Temperature Sensor | ||
| 83: Fog light | ||
| 84: Rear window heating delay | ||
| 90-’92: Front fog light | ||
| G | Turn signal relay | |
| H | 83: Main lights | |
| 84-89: Gear shift indicator | ||
| 90-’92 (Japan): Exhaust Gas Temperature Sensor | ||
| I | Overdrive | |
| J | 82–’89: Electric windows and electric fan | |
| 90–’92: Electric windows and heated seats | ||
| K | 82–’83: Central locking (unlocking) | |
| 84: Automatic high beam | ||
| 85–’92: Farah | ||
| L | 82–’83: Central locking (locking) | |
| 86-’92: Central Locking | ||
| M | 82–’89: Additional headlights | |
| 83–’92: Rear fog lights | ||
| N | 82 (Sweden): Fog light | |
| 83–’87: Additional headlights | ||
| 83-’86 (USA): Lambda-Sond (USA) | ||
| 90-’92: Supplementary High Beam’90-’92: Supplementary High Beam | ||
| O | 83–’84 (LHD + B28F): Ignition Advance | |
| 85–’86: Ignition Advance | ||
| P | 82-’83 (left hand drive): oil level sensor | |
| R | 83 (RHD + B28F): ignition advance | |
| 84–’86: Ignition Advance | ||
| 88 (780): Launch inhibitor | ||
| S | 82-’83 (RHD): Oil Level Sensor | |
| 88 (780): Theft protection | ||
Additional fuses
The glow plugs and wiring are protected by a dedicated 80 amp fuse located under the relay (130). 1985 diesel models differ from 1984 models in that they have a different glow plug control unit (P/N 1348 339) with an 80 amp fuse instead of a relay.
On vehicles equipped with Anti-lock Braking System (ABS), the system is protected by (2) additional fuses. (1) 10 Amp fuse located in the trunk on the right side and (1) 80 Amp fuse located on the left inner fender.
- ’88-’92: The ABS system is protected by an additional 10 amp fuse which is built into the surge protector on the brake pedal mount.
- ’88-91 (780): The system also includes a 10 amp fuse for the ABS (Anti-lock Braking System) function. It is built into the surge protector on the pedal mount.
- ’89-91 (780): On battery – two 30A fuses for front/rear amps (not Italy)
- ’89-91 (780): On the left suspension strut – one 10 amp fuse for the high performance turbo system (B230FT).