Land Rover Discovery IV / LR4 (L319, 2009-2016) uses a main electrical distribution box in the engine bay and separate lower and upper passenger-compartment fuse panels. The tables preserve every listed position, including unassigned slots and repeated numbers with different allocations after model-year changes. Later 2014-2016 vehicles can have substantially different engine management, camera, driver-assistance and lighting circuits from early production models.
Finding and opening the Discovery IV fuse boxes
Engine compartment: Switch off the ignition and raise the bonnet. The fuse box sits towards the rear of the engine compartment. Release the two plastic clips retaining the wiring by the air filter housing, raise the cable clear and unclip the fuse box cover. The underside of the cover also identifies the installed fuse positions. Refit it securely to keep moisture away from the terminals.
Passenger compartment: Open the glovebox and remove the lower access panel to reach the main 1-69 fuse board. A separate upper box, with positions 1-16, is behind an additional panel inside the glovebox; its numbering is independent of the main board.
Load compartment: Some model years and equipment specifications also have protection circuits behind the left-side cargo trim. Turn the trim retainer and remove the access panel, comparing the actual components with the owner’s handbook. That optional area is not depicted on the three original diagrams retained in this article.
Engine compartment – fuses 1-30 and later variants
Position 2 may be 5 A on earlier vehicles and 10 A on later models. Position 11 is listed at 15 A for oxygen-sensor or air-conditioning circuits and at 20 A for later engine management or diesel exhaust fluid equipment. Further changes affect positions 15-20, including heated glass, cameras and blind-spot monitoring. Each variant is shown separately to prevent incorrect fuse substitution.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 25 | Fuel pump |
| 2 | 5 | Up to 2014 model year: petrol engine management (MAF and oil sensor); diesel fuel heater |
| 2 | 10 | From 2014 model year: petrol engine management or diesel fuel-fired heater, depending on engine |
| 3 | 5 | Air suspension control module (ECU) |
| 4 | 25 | Engine management (ECM and fuel-pump relay control) |
| 5 | 15 | Engine management system (EMS) |
| 6 | 15 | Petrol – ignition coils; diesel – engine management sensors and glow-plug relay control |
| 7 | 10 | From 2015 model year: adaptive cruise control (ACC) |
| 8 | 25 | Rear heated seats |
| 9 | – | Unused position or no assigned circuit in this configuration |
| 10 | 10 | Up to 2014 model year: petrol engine throttle motor; diesel engine management in later early-production models |
| 11 | 15 | Up to 2014 model year: petrol oxygen sensors; 3.0-litre diesel air-conditioning compressor clutch |
| 11 | 20 | From 2014 model year: petrol engine management or diesel exhaust fluid (DEF / AdBlue) system |
| 12 | 10 | Heated washer jets |
| 13 | 15 | Engine management system (EMS) |
| 14 | 15 | Petrol – engine management oxygen sensors |
| 15 | 30 | Up to 2014 model year: heated windscreen |
| 15 | 10 | From 2015 model year: rear-view mirror, reversing cameras, Adaptive Front Lighting System (AFS) and headlamp control module |
| 15 | 5 | From 2014 model year: rear-view mirror, reversing camera and high-line camera; check overlap by equipment and build date |
| 16 | 15 | Up to 2014 model year: rear window wiper |
| 16 | 5 | From 2014 model year: blind spot monitoring and wading-depth sensing |
| 17 | 10 | Up to 2012 model year: petrol V6 EGR and EVAP control, electronics-box fan; 3.0 diesel MAF and EGR |
| 17 | 10 | Diesel engine management system on listed variants |
| 17 | 20 | From 2014 model year: petrol engine management system |
| 18 | 30 | Up to 2012 model year: heated windscreen; 2012-2014: headlamp washers |
| 18 | 5 | From 2014 model year: engine management system |
| 19 | – | Unused position or no assigned circuit in this configuration |
| 20 | 5 | Up to 2014 model year: alternator |
| 20 | 30 | From 2014 model year: headlamp washers |
| 21 | 5 | Dynamic Stability Control (DSC) and anti-lock braking system (ABS) |
| 22 | 30 | Rear blower |
| 23 | 25 | Traction control |
| 24 | 25 | Heated front seats |
| 25 | 15 | Horn |
| 26 | 20 | Air suspension control module (ECU) |
| 27 | 5 | Up to 2014 model year: engine control module (ECM) |
| 27 | 15 | From 2014 model year: air conditioning |
| 28 | 20 | Through 2016: petrol supercharged V8 intercooler pump; up to 2012: petrol V6 brake assist pump; up to 2014: diesel auxiliary heater, as equipped |
| 29 | 30 | Front windscreen wipers |
| 30 | 10 | Automatic transmission control unit |
Lower passenger compartment fuse box – positions 1-69
Position 48 may use 30 A or 15 A depending on the model year and towing specification. Position 64 supplies audio equipment (15 A) in one version and the ECM (5 A) in a later layout. Always check the year, engine and printed cover legend before replacing a fuse.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 5 | Radio-frequency receiver and tyre pressure monitoring system (TPMS) |
| 2 | – | Unused position or no assigned circuit in this configuration |
| 3 | 10 | Front fog lamps |
| 4 | 5 | Up to 2014: auto-dimming interior mirror; high-beam assist also included through 2011. Later assignment not specified |
| 5 | 5 | DSC, ABS and steering angle sensor |
| 6 | 5 | From 2015 model year: adaptive cruise control (ACC) |
| 7 | – | Unused position or no assigned circuit in this configuration |
| 8 | – | Unused position or no assigned circuit in this configuration |
| 9 | 5 | Electric parking brake (EPB) |
| 10 | 5 | Air suspension control module (ECU) |
| 11 | 10 | Trailer reversing lamp |
| 12 | 5 | Reversing lights |
| 13 | – | Unused position or no assigned circuit in this configuration |
| 14 | 5 | Up to 2014 model year: brake lamps and brake switch; from 2014: brake pedal switch |
| 15 | 30 | Heated rear window |
| 16 | 10 | Cooled centre console cubby box |
| 17 | 5 | Keyless entry/start and central door locking |
| 18 | 15 | Up to 2014: no assigned function given; from 2014: rear window wiper |
| 19 | 5 | Engine control module (ECM) |
| 20 | 10 | Heated steering wheel |
| 21 | 10 | Up to 2014: centre console controls for transfer case, HDC and DSC, headlamp levelling, rear climate controls and air-quality sensor; from 2014: centre console switches and rear climate controls |
| 22 | 5 | Automatic transmission, transfer case and rear differential |
| 23 | 5 | Up to 2014: headlamp levelling; later assignment requires model-year verification |
| 24 | 10 | Right-hand position and tail lamps |
| 25 | 10 | Left-hand position and tail lamps |
| 26 | – | Unused position or no assigned circuit in this configuration |
| 27 | 10 | Trailer position lamps |
| 28 | – | Unused position or no assigned circuit in this configuration |
| 29 | – | Unused position or no assigned circuit in this configuration |
| 30 | 25 | Front passenger window and central locking |
| 31 | 5 | Up to 2014: rain sensor and reversing camera; from 2014: rain sensor and auxiliary lighting switch |
| 32 | 25 | Driver’s electric window, exterior mirrors and central locking |
| 33 | – | Unused position or no assigned circuit in this configuration |
| 34 | 10 | Fuel filler flap release actuator |
| 35 | – | Unused position or no assigned circuit in this configuration |
| 36 | 5 | Battery-backed alarm sounder |
| 37 | 20 | Keyless entry and central locking |
| 38 | 15 | Front windscreen washer |
| 39 | 25 | Rear left electric window and central locking |
| 40 | 5 | Seat position memory, clock and driver’s door mirror / window switch |
| 41 | – | 2009-2012: unoccupied; 2012-2014: audio amplifier; from 2014: network gateway module. Verify the variant-specific rating |
| 42 | 30 | Driver’s electrically adjustable seat |
| 43 | 15 | Rear window washer |
| 44 | 25 | Rear right electric window and central locking |
| 45 | 30 | Passenger electrically adjustable seat |
| 46 | – | Unused position or no assigned circuit in this configuration |
| 47 | 20 | Sunroof |
| 48 | 30 | Up to 2014 model year: trailer connector, permanent battery supply |
| 48 | 15 | From 2014 model year: trailer connector, permanent battery supply |
| 49 | 5 | Adaptive front lighting, right-hand unit |
| 50 | 5 | Adaptive front lighting, left-hand unit |
| 51 | 5 | Steering-wheel switches |
| 52 | – | Unused position or no assigned circuit in this configuration |
| 53 | 20 | 12 V cigarette lighter |
| 54 | 15 | Trailer connector, ignition-switched feed |
| 55 | 20 | Middle and rear 12 V accessory power outlets |
| 56 | 10 | SRS airbag system |
| 57 | 10 | Interior lamps |
| 58 | – | Unused position or no assigned circuit in this configuration |
| 59 | – | Unused position or no assigned circuit in this configuration |
| 60 | – | Unused position or no assigned circuit in this configuration |
| 61 | 10 | Instrument cluster and information centre |
| 62 | 10 | Climate control ECU |
| 63 | 20 | Front 12 V accessory power outlet |
| 64 | 15 | Up to 2014 model year: audio equipment and DVD player |
| 64 | 5 | From 2014 model year: engine control module (ECM) |
| 65 | 5 | Up to 2014 model year: surround-view camera system; later assignment requires verification |
| 66 | 5 | OBD diagnostic socket |
| 67 | 15 | Up to 2014 model year: rear-seat entertainment module; later assignment requires verification |
| 68 | 10 | Up to 2014 model year: touchscreen, multimedia module, radio and telephone; later assignment requires verification |
| 69 | – | Unused position or no assigned circuit in this configuration |
Upper passenger-compartment module – positions 1-16
The auxiliary upper module serves the audio, display and integrated controls. Many numbered sockets are not occupied in the listed configuration. Its numbers should not be confused with those on the separate lower fuse board.
| Pozycja | Amperaż [A] | Chroniony obwód / funkcja |
|---|---|---|
| 1 | 15 | Touchscreen and integrated front control panel |
| 2 | 10 | Audio amplifier |
| 3 | – | Unused position or no assigned circuit in this configuration |
| 4 | 10 | Navigation and TV tuner |
| 5 | 15 | Audio head unit |
| 6 | 15 | Audio/video input-output panel |
| 7 | – | Unused position or no assigned circuit in this configuration |
| 8 | – | Unused position or no assigned circuit in this configuration |
| 9 | – | Unused position or no assigned circuit in this configuration |
| 10 | – | Unused position or no assigned circuit in this configuration |
| 11 | – | Unused position or no assigned circuit in this configuration |
| 12 | – | Unused position or no assigned circuit in this configuration |
| 13 | – | Unused position or no assigned circuit in this configuration |
| 14 | – | Unused position or no assigned circuit in this configuration |
| 15 | 15 | Front and rear integrated heating / ventilation controls |
| 16 | 20 | Fuel-fired auxiliary heater |
What changed from 2014 to 2016?
Revised engine management, diesel exhaust fluid equipment, reversing cameras, blind-spot monitoring and wade sensing altered several engine-bay fuse assignments. Some vehicles use the same position number for a completely different component after the change. Cabin positions 18, 41, 48 and 64 also differ between versions. A vehicle registered in 2014 may not have the exact layout suggested by its registration year; confirm the specific model year and equipment.
Cigarette lighter, air suspension and wipers
12 V sockets: Cabin fuse 53 (20 A) protects the lighter. The front accessory power outlet is on cabin fuse 63 (20 A), whereas the middle and rear outlets use cabin fuse 55 (20 A). These are distinct feeds.
Windscreen wipers: The front wipers are protected by engine-bay fuse 29 (30 A). Rear wiper protection changes with production year; the listings include engine-bay position 16 on earlier cars and cabin position 18 on later ones.
Air suspension and parking brake: Check engine fuses 3 (5 A) and 26 (20 A), plus cabin fuse 10 (5 A), when diagnosing loss of air suspension operation. The electric parking brake control is covered by cabin fuse 9 (5 A). A replacement fuse that blows again indicates a circuit fault; never uprate it.
Discovery III versus Discovery IV
The earlier Land Rover Discovery III / LR3 (2004-2009) fuse box guide documents a different arrangement, including separate trailer wiring fuses and a specialist armoured-vehicle satellite panel. Even though both models share the L319 designation, their fuse functions should not be treated as interchangeable.
Technical basis: “Discovery 4 Owner’s Handbook”, model year 2012, publication LRL 10 02 53 121, together with later 2014-2016 model-year fuse listings. Confirm the vehicle-specific specification and VIN.