3 is a compact car manufactured by Mazda Motor Corporation in Japan. In its domestic market, it is known as the Axela. The Mazda3 was introduced in 2003 as the successor to the Familia series (known globally as the 323 and Protegé). In this guide, we provide detailed fuse box diagrams and component locations for the second-generation Mazda3 (BL chassis; Ford C1 platform) for model years 2009, 2010, 2011, 2012, and 2013.
Below you will find the locations and diagrams for the power distribution centers. Fuses for high-use circuits such as the "Cigarette Lighter" and "Fuel Pump" are highlighted in bold.
Engine Compartment Fuse Boxes
There are three fuse and relay boxes located in the engine compartment.
Main Fuse Box
The main engine compartment distribution box is located on the driver side (left side), positioned between the battery and the fender lining (indicated by the arrow).
1. Press the retaining latch on the plastic protective cover and lift to remove it.
General assembly view.
| Fuse Box Diagram | ||
|---|---|---|
|
||
| No. | Circuit / Protected Component | Rating (A) |
| F1 | Radiator cooling fan motor | 40 |
| F2 | Powertrain Control Module (PCM) - ENG MAIN | 40 |
| F3 | Main body power supply - BTN 1 | 50 |
| F4 | Air conditioning compressor clutch | 7.5 |
| F5 | Headlamp high beams | 20 |
| F6 | Front fog lamps | 15 |
| F7 | Headlamp washers | 20 |
| F8 | Power sunroof / moonroof | 15 |
| F9 | Right windshield defroster element | 40 |
| F10 | Left windshield defroster element | 40 |
| F11 | Radiator cooling fan motor | 40 |
| F12 | Interior room lamps | 15 |
| F13 | Traction Control System (TCS) module | 15 |
| F14 | Dynamic Stability Control (DSC) module | 20 |
| F15 | Main body power supply - BTN 2 | 7.5 |
| F17 | HVAC blower motor | 40 |
| F19 | Rear window defogger element | 30 |
| F20 | Ignition switch - IG KEY 2 | 40 |
| F21 | Ignition switch - IG KEY 1 | 40 |
| F22 | Horn | 15 |
| F23 | Stop lamps / brake lights | 15 |
| F24 | Powertrain Control Module - ENG+B | 10 |
| F25 | Fuel pump | 25 |
| F26 | Anti-lock Braking System (ABS) module | 40 |
| F27 | Heated front seats | 20 |
| F28 | Electro-Hydraulic Power Assist Steering (EHPAS) module | 80 |
| F30 | ABS module (ignition feed) | 10 |
| F32 | Right headlamp low beam | 15 |
| F33 | Left headlamp low beam | 15 |
| F34 | Instrument cluster illumination | 7.5 |
| F35 | Tail lamps / parking lamps | 15 |
| F36 | Engine management system - ENG IGN | 15 |
| F37 | Powertrain Control Module - ENG BAR 1 | 15 |
| F38 | Powertrain Control Module - ENG BAR 2 | 20 |
| F39 | Electronic Throttle Valve (ETV) actuator | 15 |
| Relay Box Assignment | |
|
|
| R1 | Fuel injectors (2.3L Turbo / MZR DISI) |
| R2 | Low beam headlamps |
| R3 |
|
| R4 | High beam headlamps |
| R5 | Fuel pump relay |
| R6 | Daytime Running Lights (DRL) |
| R7 | Starter motor |
| R8 | HVAC blower motor |
| R9 | Horn |
| R10 | Tail, Number, and Side marker lamps (TNS) |
| R11 | Rear window defogger |
| R12 | A/C compressor clutch |
| R13 | PCM main relay |
Battery Terminal Fuse Block
A high-current main fuse block is mounted directly on the positive (+) battery terminal.
1. Unclip the two retaining latches on the protective battery cover and remove it.
2. Using a box wrench or 10 mm socket, loosen the terminal clamp bolt on the negative (-) battery terminal, then disconnect and position the cable aside.
3. Using an 8 mm socket, remove the two nuts securing the terminal lugs to the fuse block.
| Battery Fuse Terminal Layout | ||
|---|---|---|
|
||
| No. | Circuit / Protected Component | Rating (A) |
| F1 | Generator / Alternator | 100 |
| F2 | Not used | - |
| Battery Auxiliary Box Diagram | ||
|---|---|---|
|
||
| No. | Circuit / Protected Component | Rating (A) |
| F1 | Radiator cooling fan motor | 30 |
| F2 | 30 | |
| 1 | Parking lamp relay | |
| 2 | Auxiliary relay | |
Auxiliary Fuse & Relay Modules
Two auxiliary relay blocks are located on the left side of the engine compartment (indicated by arrows).
Because the covers on these auxiliary blocks are identical and share duplicate label markings, exact component assignments should be verified via circuit tracing or functional testing.
Passenger Compartment Fuse Box
The interior junction block (fuse panel) is located to the left of the steering column on the end panel of the dashboard. Remove the access panel to reach the fuses.
Access panel removal.
| Fuse Box Diagram | ||
|---|---|---|
|
||
| No. | Circuit / Protected Component | Rating (A) |
| F1 | Audio head unit | 30 |
| F2 | Engine cooling fan control module | 30 |
| F3 | Power window motors | 50 |
| F4 | Central door locking system | 7.5 |
| F5 | Not used | - |
| F6 | - | |
| F7 | Electronic steering column lock | 15 |
| F8 | Supplemental Restraint System (SRS / Airbag) | 15 |
| F9 | Not used | - |
| F10 | Hazard warning lights / Security alarm | 15 |
| F11 | Instrument cluster / Meter circuit - METER | 15 |
| F12 | Auxiliary power outlets | 15 |
| F13 | Rear window wiper motor | 15 |
| F14 | Cigarette lighter socket | 20 |
| F15 | Not used | - |
| F16 | HVAC blower motor | 10 |
| F17 | Power exterior mirror motors | 10 |
| F18 | Starter control signal | 10 |
| F19 | Not used | - |
| F20 | Audio system | 7.5 |
| F21 | Heated exterior mirrors | 7.5 |
| F22 | Adaptive Front-lighting System (AFS) / Cornering lamps | 7.5 |
| F23 | Not used | - |
| F24 | Powertrain Control Module (PCM) | 10 |
| F25 | Not used | - |
| F26 | - | |
| F27 | - | |
| F28 | - | |
| F29 | - | |
| F30 | Power window motors | 25 |
| F31 | Not used | - |
| F32 | Windshield wiper and washer system | 25 |
| F33 | Not used | - |
| F34 | - | |