Fuses and relays Renault Megane (3, 2008-2016)

Renault Megane 3 generations were produced in 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 and 2016. During these 9 years, the car has been restyled 2 times. The most common body options are a station wagon and a 5-door hatchback, although there are also coupes and sedans on the market (under a separate brand of Fluence).

We will describe the purpose of the relays and fuses in Megane 3, show where the blocks and their circuits are.

In the passenger compartment

Fuse box

Located in the dashboard, on the left.

Diagram
№	Amps / Description
F1	Empty
F2	Empty
F3	10A cigarette lighter fuse
F4	10A rear power outlet
F5	10A socket in the luggage compartment
F6	10A audio system
F7	5A electric heated exterior mirrors
F8	10A windshield washer, door open indicator
F9	30A automatic parking brake
F10	10A dashboard shield
F11	25A power seat, steering column switches
F12	20A electric heated passenger seat
F13	Empty
F14	25A electric window regulator for the front passenger door
F15	5A brake light switch, brake pedal position sensor, ABS / ESP control unit
F16	25A electric window regulator of the right rear door
F17	25A electric window regulator of the left rear door
F18	10A glove compartment lamp, left luggage compartment lamp, door lamps, sun visor mirror lamps, rain sensor
F19	10A clock, outside temperature indicator, seat belt warning indicator, audio system connector
F20	5A air conditioning control unit
F21	3A mirror lamps in sun visors
F22	3A interior lampshades, rain and light sensor
F23	20A trailer connector
F24	15A UCH
F25	3A interior rearview mirror
F26	10A navigation system, CD changer, audio system
F27	20A audio system, parking brake control unit
F28	Empty
F29	Empty
F30	15A UCH, direction indicators
F31	10A UCH
F32	30A electric window regulator driver's door
F33	25A UCH, central locking
F34	30A ECU multiplex network passenger door
F35	15A clock, outdoor temperature gauge, phone display
F36	15A diagnostic socket, horn relay, alarm control unit, siren
F37	10A brake signals, electrical control unit
F38	30A automatic parking brake
F39	30A convertible roof ECU
F40	40A electric fan for air conditioning
F41	25A electric sunroof
F42	40A rear window heating
RA	70А - power relay (+ battery) with delayed shutdown (without power off at startup)
RB	70A - power relay (+ battery) with delayed shutdown (with power off at startup)
RC	40A - Heated rear window relay
RD	20A - horn relay

Additional relays

A separate "+" relay when the engine is running at 40A can be located under the passenger seat. Thus, a pair of additional heating relays can be located on the central console heater block.

In the engine compartment

Protection and switching box

Is located in the engine junction box (in the engine compartment).

The photo - example.

Assignment of the fuses in the engine protection and switching box
№	A - Description
1	10A - Side light (right headlamp, right tail light, headlights), license plate lights, cigarette lighter lights, power window switch lights, audio system, navigation system control unit, multimedia system keyboards
2	10A - Side light (left headlamp, left rear lamp), left lamp on the tailgate
3	15A - Headlight washer pump
4	20A - Fog lights
5	10A - High beam (left block headlamp)
6	10A - High beam (right headlamp)
7	15A - Diagnostic socket, rear window heating relay, automatic transmission mode selector, electric headlight corrector, gas discharge lamp control unit, auxiliary heater control unit, speed limiter, automatic parking brake, automatic parking control unit, mirror with dimming in the passenger compartment
8	30A - to the ABS, ESP control unit
9	30A - Front wiper
10	10A - Airbag control unit
11	20A - Not used
12	7,5А - transmission ECU
13	25A - Engine management system
14	15A - Oxygen concentration sensors - heating
15	20A - transmission ECU
16	5A - Brake signals, electrical control unit, electric power steering
17	10A - Automatic gearbox operating modes sensor, electro-corrector of headlights, reversing light relay
18	15A - Electrical equipment control unit
19	30A - Starter
20	Empty
21	20A - Fuel pump, ignition coils, LPG ECU
22	10A - Electromagnetic clutch of the air conditioner compressor
23	5A - ECU injection system
24	20A - Low beam (left headlight), electric corrector
25	20A - Low beam (right headlight), electrocorrector
26	Empty

Block #2 is located in the junction box in the engine compartment under the protection and switching unit.

Assignment:

• A - Empty
• B - Fuel heater relay
• C - Reverse light relay
• D - Empty
• F1 - 80A immersion heater control unit
• F2 - 70A preheating unit
• F3 - Empty
• F4 - 80A immersion heater control unit
• F5 - 60A / 40A fan relay
• F6 - 20A Fuel heater
• F7 - Empty
• F8 - 30A fan relay
• F9 - Empty

Blocks near the battery

Battery disconnect unit (1)

Appointment

• F1 - 190A Starter
• F2 - 50A fuse and relay box in the passenger compartment
• F3 - 80A fuse and relay box (control and switching unit) in the engine compartment 1, fuse and relay box in the passenger compartment
• F4 - 300A / 190A engine compartment fuse and relay box 2 / alternator
• F5 - 80A electric power steering
• F6 - 35A electronic engine control unit (ECU) / fuse and relay box (control and switching unit) in the engine compartment 1
• F7 - 5A fuse and relay box (control and switching unit) in the engine compartment 1

High Power Fuse Block (2)

Photo of the unit on the battery

Fuse-link diagram

Description

1. 70A - additional interior heater,
2. 80A - fuse and relay box in the passenger compartment,
3. 80A - fuse and relay box in the passenger compartment,
4. 80A - fuse and relay box (control and switching unit) in the engine compartment 1, fuse and relay box in the passenger compartment,
5. 30A - additional heater,
6. 50A - ABS ECU with ESP