Understanding your 2012 Volkswagen Jetta’s fuse box is crucial for diagnosing and resolving electrical issues. Fuses protect your vehicle’s electrical circuits from overloads, and knowing their location and function can save you time and money on repairs. This guide provides a detailed overview of the fuse box locations and fuse diagrams for the Volkswagen Jetta models manufactured in 2012, ensuring you have the information you need right at your fingertips. Whether you are experiencing issues with your headlights, interior lights, or other electrical components, this comprehensive fuse diagram will help you pinpoint the problem and get your Jetta back on the road.
Passenger Compartment Fuse Box
The primary fuse box in your 2012 VW Jetta is located inside the passenger compartment, making it easily accessible for routine checks and fuse replacements.
Fuse Box Location
To access the passenger compartment fuse box in your 2012 Volkswagen Jetta, locate the cover on the driver’s side dashboard. This cover is typically positioned on the side panel that is visible when the driver’s door is open. To open it, gently pull the lower edge of the cover in the direction indicated by the arrow, usually downwards and outwards. Once released at the bottom, the cover can be removed by lifting it upwards. Inside the fuse box cover, you will often find a set of plastic tweezers specifically designed for removing and inserting fuses, a handy tool to keep your fuse replacements clean and simple.
Fuse Box Diagram (-SC-)
Below is the fuse box diagram for the passenger compartment of the 2012 Volkswagen Jetta. This diagram details the function of each fuse, its amperage, and the corresponding component it protects. Refer to this diagram to identify the correct fuse for the circuit you are troubleshooting.
| № | Amps | Function/Component |
|---|---|---|
| F1 | 10A | Left washer nozzle heater Right washer nozzle heater (2014-2017 models) |
| F2 | 5A/7.5A | Electronic steering column lock control module |
| F3 | 10A | Instrument cluster control module |
| F4 | 2A/10A | Telephone Transceiver Compass magnetic field sensor (vehicles equipped with Start/Stop) (2012-2017 models) |
| F5 | 7.5A | Left rear fog lamp bulb (2012-2017 models) |
| F6 | 10A | Vehicle electrical system control module (T73a/66) (interior lamp, AW0 only) Rearview camera (2014-2017 models) |
| F7 | 5A | Fog lamp relay (AW0 only) Instrument panel and switch illumination dimmer switch (AW0 only) License plate lamp Vehicle electrical system control module (T52c/27), (AW1 only) |
| F8 | 7.5A | Windshield and headlamp washer pump switch (AW0 only) Windshield washer pump (AW0 only) Vehicle electrical system control module (T73b/61), (AW0 only) |
| F8 | – | Not used (AW1 only) |
| F9 | 5A/15A | Airbag control module Airbag Control Module Front passenger airbag “disabled” indicator lamp Passenger occupant detection system control module |
| F10 | 10A | Right steering column switch (T10ls/3) (AW0 only) |
| F11 | 10A | Left front headlamp (HID headlamp) (2012-2017 models) |
| F12 | 10A | Right front headlamp (HID headlamp) (2012-2017 models) |
| F13 | 5A | Automatic dimming interior rearview mirror Light recognition sensor Parking aid control module Air quality sensor High pressure sensor Climatronic control module Tire pressure monitoring button ASR/ESP button Back-up lamp switch Start/Stop mode switch 28-pin connector (T28/10) Mirror adjusting switch Exterior rearview mirror heating switch AC compressor control module (T14hy/14) (Engine code CNLA) Cornering lamp and headlamp range control module |
| F14 | 10A | Left steering column switch (T16ls/1) (AW0 only) ABS control module T26/20 / T47/8 Light switch (T10h/4) (AW1 only) Airbag spiral spring/return spring with slip ring (T16k/14) Fuel pump control module Towing recognition control module (T12a/2) Voltage stabilizer Converter with socket, 12V-230V (T3wr/3) Data bus on board diagnostic interface (AW1 only) Instrument cluster control module Selector lever sensor system control module Tiptronic switch (T10s/9) Power steering control module (T6z/1) Oil level thermal sensor (T6z/4) Hybrid battery unit (T14ax/7) (Engine code CNLA) Electric drive power and control electronics (T28jx/56) (Engine code CNLA) |
| F15 | 10A | 16-pin connector (diagnostic connection) Instrument panel and switch illumination dimmer switch Headlamp range control adjuster (AW1 only) Fresh air blower relay Mass airflow sensor Positive crankcase ventilation heating element – Structure borne sound control module Left front headlamp Left headlamp beam adjustment motor Right front headlamp Right headlamp beam adjustment motor Vehicle electrical system control module (T73a/44) |
| F16 | 10A | Auxiliary engine coolant pump relay Fuel pump control module Engine control module Electric drive button (Engine code CNLA) |
| F17 | 10A | Anti-theft alarm system horn (Running change) Anti-theft alarm system interior sensor (Running change) Anti-theft alarm system alarm (Running change) (2012-2017 models) |
| F18 | 15A | Left front headlamp Left low beam headlamp bulb (vehicles with China equipment) |
| F19 | 15A | Right front headlamp Right low beam headlamp bulb (vehicles with China equipment) |
| F20 | 10A | Ignition/starter switch (T10/10) (AW0 only) Tiptronic switch Automatic transmission control module Selector lever sensor system control module Climatronic control module Auxiliary engine coolant heater radio frequency receiver |
| F21 | 15A/20A | Vehicle electrical system control module (T73a/73), (AW0 only) Dual tone horn relay (AW1 only) High tone horn (AW1 only) Low tone horn (AW1 only) (2012-2017 models) |
| F22 | 20A/10A/7.5A | Ignition/starter switch (AW0 only) Converter box (AW0 only) Interior monitoring sensor Alarm horn relay Alarm horn Dual tone horn relay (2010-1011) |
| F23 | 10A | Vehicle electrical system control module (T73b/39) (AW0 only) 16-pin connector (diagnostic connection) Light switch (AW1 only) Rain/light recognition sensor Compass magnetic field sensor (vehicles without Start/Stop) |
| F24 | 10A | Vehicle electrical system control module (T73a/64) (AW0 only) Access/start authorization control module |
| F25 | 15A | Automatic transmission control module Selector lever sensor system control module Multifunction switch |
| F26 | 15A | Brake system vacuum pump |
| F27 | 1A | Airbag spiral spring/return spring with slip ring (T16k/1) (2012-2017 models) |
| F28 | 40A | Auxiliary heater operation relay |
| F29 | 1A | Vehicle electrical system control module (T73b/51) (AW0 only) Ignition/starter switch (AW0 only) Converter box (AW0 only) |
| F30 | 20A | Cigarette lighter 12V socket 12V socket 2 Blocking diode |
| F31 | 30A | Light switch (T17/1) (AW0 only) |
| F32 | 20A | Light switch (T17/2) (AW0 only) |
| F33 | 40A | Heater/heat output switch Fresh air blower relay AC control module Fresh air blower switch |
| F34 | 15A | Left high beam headlamp bulb (AW0 only) Right high beam headlamp bulb (AW0 only) Instrument cluster control module (AW0 only) |
| F35 | 10A | Steering column electronics control module (AW1 only) Data bus on board diagnostic interface (AW1 only) Instrument cluster control module (2010-2011) Signal horn activation (2010-2012) |
| F36 | 25A | Vehicle electrical system control module (T73a/16) (AW0 only) (T52b/1) (AW1 only) Vehicle electrical system control module (T73a/61) (AW0 only) (Running change) |
| F37 | 15A | Left front headlamp Left daytime running lamp bulb |
| F38 | 15A | Right front headlamp Right daytime running lamp bulb |
| F39 | 20A | Low beam relay |
| F40 | 15A | Towing recognition control module (T12a/9) |
| F41 | 15A | Towing recognition control module (T12a/12) |
| F42 | 20A | Towing recognition control module (T12a/11) |
| F43 | 30A | Front passenger door control module |
| F44 | 25A/30A | Rear window defogger relay (AW1 only) Rear window defogger Vehicle electrical system control module (T73b/67) (AW0 only) |
| F45 | 30A | Driver door control module Front passenger door control module (vehicles with China equipment) |
| F46 | 30A | Left rear door control module Right rear door control module |
| F47 | 15A | Fuel pump control module Fuel pump relay Fuel primer relay |
| F48 | 20A | Vehicle electrical system control module |
| F49 | 40A | Fresh air blower Climatronic control module A/C control module |
| F50 | 30A | Front seat heating control module |
| F51 | 20A | Sunroof control module |
| F52 | 20A | Headlamp Washer Relay Headlamp washer pump (2013-2017 models) Dual tone horn relay (2010-2012 models) |
| F53 | 15A | Driver seat lumbar support adjustment switch (2013-2017 models) Front seat heating control module (2010-2012 models) |
| F54 | 15A | Fog lamp relay |
| F55 | 20A | Light switch (T17/15) (AW0 only) Left steering column switch (T16ls/10) (AW0 only) |
| F56 | 10A | Hybrid battery unit (T14ax/5) (Engine code CNLA) Electric drive power and control electronics (T28jx/55) (Engine code CNLA) (2013-2017 models) |
| F57 | 15A/25A | Radio Radio/Navigation Display Control Module |
| F58 | 1A/30A | Converter with socket 12V-230V Telephone Transceiver (2010-2011 models) |
| F59 | 15A/30A | Fan activation relay (Engine code CNLA) Battery fan 1 (Engine code CNLA) (2013-2017 models) Amplifier (2010-2012 models) |
| F60 | 30A | Auxiliary heater control module |
| – | 20A | Driver power seat adjustment circuit breaker 1 (it is located above relay carrier) |
Relays
Relays are also housed within the passenger compartment fuse box area, typically located above the fuse panel itself. These relays control higher current circuits and various vehicle systems. The 2012 Volkswagen Jetta utilizes different relay carrier configurations depending on the production date.
15-Pin Relay Carrier (for earlier 2012 models and 2010-2011)
| № | Description |
|---|---|
| R1 | Converter box (E-Box Low, (AWO)) |
| R2 | Fresh air blower relay |
| R3 | Auxiliary heater operation relay -J485- (449) |
| R4 | Fuel Pump Relay Engine Component Power Supply Relay Auxiliary engine coolant pump relay |
| R5 | Low beam relay (E-Box Low, (AWO)) |
| R6 | Fresh air blower relay |
| R7 | Terminal 75 power supply relay 1 |
| R8 | Dual tone horn relay Headlamp washer relay |
| R9 | Power Supply Relay (terminal 50) -J682- (643) |
| R10 | Terminal 15 power supply relay 2 -J681- (643) |
| R11 | Rear window defogger relay -J9- (449) |
| R12 | Fuel pump relay 2 Heat resistance relay Cold start injector relay Fuel primer relay |
| R13 | Power Supply Relay (terminal 50) |
| R14 | Terminal 15 power supply relay |
| R15 | Fog lamp relay |
12-Pin Relay Carrier (for later 2012 models and 2013-2017)
| № | Description |
|---|---|
| R1 | Dual tone horn relay Alarm horn relay (USA and Mexico, E-Box Low) Headlamp washer relay |
| R2 | Power Supply Relay (terminal 50) Starter relay 2 Driver power window opening relay (E-Box high, since 2013) Driver power window closing relay (E-Box high, since 2013) |
| R3 | Cold start injector relay (since 2013) Secondary air injection pump relay (CNLA) Fuel pump relay 2 Front passenger power window opening relay (E-Box high, since 2013) Heat resistance relay Front passenger power window closing relay (E-Box high, since 2013) |
| R4 | Coolant circulation pump relay (up to 2012) Fuel Pump Relay Auxiliary engine coolant pump relay Fuel primer relay Engine Component Power Supply Relay (E-Box high, since 2013) |
| R5 | Terminal 75 power supply relay 1 (up to 2012) |
| R6 | Power Supply Relay (terminal 50) Starter relay 1 |
| R7 | Terminal 15 power supply relay (E-Box Low) Auxiliary heater operation relay (E-Box high) Power window relay (E-Box high, since 2013) |
| R8 | Low beam relay (E-Box Low) Rear window defogger relay (E-Box high) |
| R9 | Terminal 15 power supply relay 2 |
| R10 | Terminal 75 power supply relay 1 |
| R11 | Fog lamp relay (E-Box Low) Fresh air blower relay (E-Box high) Fan activation relay (hybrid) |
| R12 | Converter box (E-Box Low) |
Engine Compartment Fuse Box
In addition to the passenger compartment fuse box, your 2012 Volkswagen Jetta also has a fuse box located in the engine compartment. This fuse box typically houses fuses and relays for critical engine and vehicle functions.
Fuse Box Location
The engine compartment fuse box in the 2012 Volkswagen Jetta is usually situated near the battery, often on the driver’s side of the engine bay. It is enclosed in a black plastic box. To open the fuse box, locate the release tabs on the sides of the cover. Push these tabs in the direction of the arrows, typically inwards or sideways, to disengage them. Once the tabs are released, you can lift the fuse box cover upwards to access the fuses and relays inside.
Fuse Box Diagram (-SB-)
The following diagram outlines the fuse layout for the engine compartment fuse box in your 2012 Volkswagen Jetta. This diagram is essential for identifying the correct fuse for components located in the engine bay.
| № | Amps | Function/Component |
|---|---|---|
| F1 | – | Not used |
| F2 | 10A/15A | Engine control module Engine component power supply relay |
| F3 | 5A/10A | Coolant fan control module Relay for low heat output Relay for high heat output |
| F4 | 5A/10A/15A | Oxygen sensor heater Heater for oxygen sensor 1 after catalytic converter High temperature circuit coolant pump (Engine codes CNLA, CRJA) Low temperature circuit coolant pump |
| F5 | 5A/10A/20A | Oxygen sensor heater Oxygen sensor 2 heater (Engine codes CNLA, CRJA) Leak detection pump Wastegate bypass regulator valve EGR cooler switch-over valve Positive crankcase ventilation heating element Mass airflow sensor (Engine code CFFB) Vacuum pump relay Brake system vacuum pump |
| F6 | 5A/10A/15A/20A | Leak detection pump EVAP canister purge regulator valve 1 Tank switch-off valve Secondary air injection pump relay |
| F6 | 5A/10A/15A | Water pump Auxiliary heater heating element Relay for low heat output Relay for high heat output |
| F7 | 20A | Petrol: Ignition coil 1~4 with power output stage |
| F7 | 5A | Diesel: Fuel pressure regulator valve Fuel metering valve |
| F8 | 10A | Throttle valve control module Wastegate bypass regulator valve EVAP canister purge regulator valve 1 Camshaft adjustment valve 1 Turbocharger recirculation valve Intake manifold runner control valve Exhaust camshaft adjustment valve 1 (Engine codes CNLA, CRJA) Oil pressure regulation valve (Engine codes CNLA, CRJA) Decoupler pressure actuator (Engine codes CNLA, CRJA) Refrigerant cut-off valve (Engine codes CNLA, CRJA) |
| F9 | 5A/15A | Secondary air injection sensor 1 Secondary air injection sensor 2 Automatic glow time control module Fuel pump relay 2 Fuel pump relay EVAP canister purge regulator valve 1 Camshaft adjustment valve 1 Fuel pressure regulator valve After-run coolant pump Coolant circulation pump relay Engine coolant circulation pump 2 |
| F10 | 5A | Brake lamp switch Clutch position sensor Auxiliary engine coolant pump relay Brake booster relay (Engine codes CNLA, CRJA) Speed sensor |
| F11 | – | Not used |
| F12 | 5A | Ignition coil 1~4 with power output stage After-run coolant pump |
| F13 | 5A/20A | Auxiliary engine coolant pump relay Water pump Brake booster relay (Engine codes CNLA, CRJA) Brake system vacuum pump (Engine codes CNLA, CRJA) |
| F14 | 5A | Engine control module Main relay |
| F15 | 30A | Voltage stabilizer |
| F16 | 30A | ABS control module |
| F17 | 30A | DSG transmission Mechatronic |
| F18 | 20A | DSG transmission Mechatronic |
| F19 | 1A | Vehicle electrical system control module (T52a/24) AW1, (T73b/59) AW0 |
| F20 | 30A | Vehicle electrical system control module (AW0) Wiper/washer intermittent relay (AW1) Wiper motor change-over relay 1 (AW1) Wiper motor change-over relay 2 (AW1) |
| F21 | 50A | Secondary air injection pump motor |
| F22 | 40A | Auxiliary heater heating element |
| F23 | 40A | ABS control module |
| F24 | 50A | Towing recognition control module |
| F25 | 50A | Terminal 15 power supply relay Terminal 15 power supply relay 2 |
| F26 | 50A/40A | Automatic glow time control module Secondary air injection pump relay Secondary air injection pump motor (Engine codes CNLA, CRJA) |
| F27 | 50A/60A | Coolant fan |
| F28 | 40A | Vehicle electrical system control module (AW1) |
| F29 | 40A | Vehicle electrical system control module (AW1) |
| F30 | 50A | Terminal 75 power supply relay 1 |
| F31 | 30A | Amplifier |
| F32 | 40A | Auxiliary heater heating element |
| 508 | Threaded connection (30) on the E-box | |
| SA1 | 200A | Without Hybrid system: Generator With Hybrid system: Electric drive power and control electronics Voltage converter |
| SA2 | – | Not used |
| SA3 | 80A | Steering |
| SA4 | 80A | Without Hybrid system: Interior terminal 30 power supply SC fuses |
Relays
Similar to the passenger compartment, the engine compartment fuse box also incorporates relays. These relays manage high-power circuits and control various engine-related systems.
| R1 | Wiper motor change-over relay 1 / Not used (AW0) |
| R2 | Wiper motor change-over relay 2 / Not used (AW0) |
| R3 | Main relay Terminal 30 power supply relay Fuel primer relay |
| R4 | Relay for low heat output Coolant circulation pump relay (Running change) Auxiliary engine coolant pump relay |
| R5 | Relay for high heat output Secondary air injection pump relay (gasoline) Brake booster relay (Hybrid, with auxiliary heater) |
| R6 | Automatic glow time control module Brake booster relay (Hybrid, without auxiliary heater) |
By utilizing these fuse box diagrams and understanding the locations, you can effectively diagnose and address electrical issues in your 2012 Volkswagen Jetta. Remember to always consult your vehicle’s owner’s manual for the most accurate and up-to-date information, and ensure to use the correct replacement fuses to maintain the integrity of your vehicle’s electrical system.
