Fuse and relay box diagrams – Mazda B series
Applies to vehicles manufactured over the years:
2010.
Fuse panel in passenger compartment
The fuse panel is located under the right side of the instrument panel, behind the footboard.
| Number | Amps [A] | Description |
| 1 | 5 | Dimmer switch on the instrument panel |
| 2 | 10 | Towing lights for trailers |
| 3 | 10 | Right Hand Beam Headlight |
| 4 | 10 | Left Dipped-beam headlight |
| 5 | 30 | Windshield wiper module (RUN/ACCY) |
| 6 | 10 | Radio (RUN/ACCY), door switch light |
| 7 | – | Not used |
| 8 | 10 | Restraint control module (RCM), PADI (passenger airbag deactivation indicator), occupant classification sensor (OCS) |
| 9 | 5 | Cluster airbag indicator |
| 10 | 10 | Cluster (RUN/START), 4×4 module (RUN/START) |
| 11 | 10 | Passenger compartment fuse panel (logical power supply) |
| 12 | 15 | Satellite radio, Audiophile subwoofer amplifier, Satellite radio |
| 13 | 15 | Horn, interior lamps |
| 14 | 15 | High beam headlight, high beam indicator (cluster) |
| 15 | – | Not used |
| 16 | 30 fuse cartridges | Electric windows |
| 17 | 15 | Direction/Hazard Indicators |
| 18 | – | Not used |
| 19 | 20 | Central stop lamp (CHMSL)/Stop lamp |
| 20 | 10 | Anti-lock braking system (ABS) module, speed control module, reversing lights, overdrive override switch, electronic blinker (turn) |
| 21 | 5 | Starter relay solenoid |
| 22 | 5 | Radio (START) |
| 23 | 30 | Headlights (low and high beam) |
| 24 | 20 | Radio battery power supply (B+) |
| 25 | – | Accessory Relay (Power Windows) |
| 26 | 2 | Redundant cruise control switch |
| 27 | 10 | A/C blower relay / mixed doors |
| 28 | 15 | Battery power supply for 4×4 module (B+) |
| 29 | 20 | Cigarette Lighter, Diagnostic Connector (OBD II) |
| 30 | 5 | Electric Mirrors |
| 31 | 20 | Front parking lights, rear parking lights, license plate lights, dimmer, trailer parking lights |
| 32 | 5 | Brake switch (logic) |
| 33 | 5 | Battery supply for instrument cluster (B+) |
| 34 | 20 | Power Point |
| 35 | 15 | Power supply interlocks |
Power Distribution Box
The power distribution box is located in the engine compartment.
2.3 l engine (if equipped)
| Number | Amps [A] | Description |
| 1 | 40** | Passenger compartment fuse panel |
| 2 | – | Not used |
| 3 | 40** | Passenger compartment fuse panel |
| 4 | – | Not used |
| 5 | 50** | Passenger compartment fuse panel |
| 6 | – | Not used |
| 7 | 30** | Starter Solenoid |
| 8 | – | Not used |
| 9 | 40** | Ignition Switch |
| 10 | – | Not used |
| 11 | 30** | Powertrain Control Module (PCM) |
| 12 | – | Not used |
| 13 | 30** | Fan motor (air conditioner) |
| 14 | – | Not used |
| 15 | – | Not used |
| 16 | – | Not used |
| 17 | 40** | Antilock Braking System Module (ABS) |
| 18 | – | Not used |
| 19 | 20** | Engine Fan |
| 20 | – | Not used |
| 21 | 10* | PCM maintains power supply, canister purge valve solenoid |
| 22 | – | Not used |
| 23 | 30* | Fuel pump motor, fuel injectors |
| 24 | – | Not used |
| 25 | 10* | A/C Clutch Solenoid Valve |
| 26 | – | Not used |
| 27 | – | Not used |
| 28 | – | Not used |
| 29 | 30* | Windshield wiper/washer |
| 30 | – | Not used |
| 31 | – | Not used |
| 32 | – | Not used |
| 33 | 30* | Antilock brake system module (ABS) |
| 34 | – | Not used |
| 35 | – | Not used |
| 36 | – | Not used |
| 37 | – | Not used |
| 38 | 7,5* | Towing a trailer (right turn) |
| 39 | 15* | PCM power |
| 40 | – | Not used |
| 41 | 10* | Automatic transmission |
| 42 | 7,5* | Towing a trailer (left turn) |
| 43 | 20* | Engine fan relay coil, air conditioning relay, engine sensors, steam management valve solenoid |
| 44 | 15* | Ignition coil, capacitor |
| 45A | – | Not used |
| 45B | – | Not used |
| 46A | – | Fuel pump relay, fuel injector relay |
| 46B | – | Not used |
| 47 | – | Motor Fan Relay |
| 48 | – | Startup Relay |
| 49 | – | Not used |
| 50 | – | Not used |
| 51 | – | Not used |
| 52 | – | Not used |
| 53 | – | Not used |
| 54 | – | PCM Relay |
| 56 | – | Blower relay |
| 56A | – | A/C Clutch Solenoid Relay |
| 56B | – | Not used |
| * Mini fuses ** Maxi fuses | ||
3.0L and 4.0L engines (if equipped)
| Number | Amps [A] | Description |
| 1 | 40** | Passenger compartment fuse panel |
| 2 | – | Not used |
| 3 | 40** | Passenger compartment fuse panel |
| 4 | – | Not used |
| 5 | 50** | Passenger compartment fuse panel |
| 6 | – | Not used |
| 7 | 30* | Starter Solenoid |
| 8 | – | Not used |
| 9 | 40** | Ignition Switch |
| 10 | – | Not used |
| 11 | 30** | Powerplant control module (PCM) relay fuse |
| 12 | – | Not used |
| 13 | 30** | Fan motor (air conditioner) |
| 14 | – | Not used |
| 15 | – | Not used |
| 16 | – | Not used |
| 17 | 40** | Antilock Braking System Module (ABS) |
| 18 | – | Not used |
| 19 | – | Not used |
| 20 | – | Not used |
| 21 | 10* | PCM maintains power supply, canister purge valve solenoid |
| 22 | – | Not used |
| 23 | 30* | Fuel pump motor, fuel injectors |
| 24 | – | Not used |
| 25 | 10* | A/C Clutch Solenoid Valve |
| 26 | – | Not used |
| 27 | 20* | 4×4 Module |
| 28 | – | Not used |
| 29 | 30* | Windshield wiper/washer |
| 30 | – | Not used |
| 31 | 15* | Fog Lights |
| 32 | – | Not used |
| 33 | 30* | ABS module |
| 34 | – | Not used |
| 35 | – | Not used |
| 36 | – | Not used |
| 37 | – | Not used |
| 38 | 7,5* | Towing a trailer (right turn) |
| 39 | 15* | PCM power |
| 40 | – | Not used |
| 41 | 10* | Automatic transmission |
| 42 | 7,5* | Towing a trailer (left turn) |
| 43 | 20* | A/C relay coil, engine sensors, vapor management valve solenoid, EGR solenoid, heated PCV |
| 44 | 15* | Ignition coil, capacitor |
| 45A | – | Not used |
| 45B | – | Not used |
| 46A | – | A/C Clutch Solenoid Valve |
| 46B | – | Not used |
| 47 | – | PCM Relay |
| 48A | – | Fuel pump relay, fuel injector relay |
| 48B | – | Light Fog Relay |
| 51 | – | Not used |
| 52 | – | Not used |
| 53 | – | Not used |
| 54 | – | Not used |
| 55 | – | Blower relay |
| 56 | – | Startup Relay |
| * Mini fuses ** Maxi fuses | ||
