Mazda B-Series (2002 – 2006) Fuse Box Location & Diagrams
The Mazda B-Series (2002–2006) fuse box protects essential electrical systems and components. This guide covers fuse box locations, fuse ratings, protected components, and clear diagrams for easy fuse identification.
Fuse Box Location
Passenger Compartment Fuse Box
Until 2004
The fuse panel is located on the left-hand side of the instrument panel facing the driver’s side door. To remove a fuse use the fuse puller tool provided on the fuse panel cover.
After 2004
The fuse panel is located under the right-hand side of the instrument panel behind the kick panel.
Engine Compartment Fuse Box
The power distribution box is located in the engine compartment.
Fuse Box Diagrams
Passenger Compartment Fuse Box
Mazda B-Series 2002 & 2003
| # | Amp | Description |
|---|---|---|
| 1 | 5A | Power Mirror Switch |
| 2 | 10A | DRL, Back-up Lamps, Transmission, Passenger Air Bag Deactivation Switch, Blower Motor Relay |
| 3 | 7.5A | 2002: Right Stop/Turn Trailer Tow Connector; 2003: Left Stop/Turn Trailer Tow Connector |
| 4 | — | Not Used |
| 5 | 15A | 4×4 Control Module |
| 6 | 2A* | 2002: Not Used; 2003: Brake Pressure Switch |
| 7 | 7.5A | 2002: Left Stop/Turn Trailer Tow Connector; 2003: Right Stop/Turn Trailer Tow Connector |
| 8 | — | Not Used |
| 9 | 7.5A | Brake Pedal Position Switch |
| 10 | 7.5A | 2002: Speed Control Servo/Amplifier Assembly, Generic Electronic Module (GEM), Shift Lock Actuator, Turn Signals ; 2003: Speed control servo/amplifier assembly, Generic Electronic Module (GEM), Shift lock actuator, Turn signals, 4×4 |
| 11 | 7.5A | 2002: Instrument Cluster, 4×4, Main Light Switch, Central Security Module (CSM) ; 2003 :Instrument cluster, 4×4, Main light switch, Central Security Module (CSM), Generic Electronic Module (GEM) |
| 12 | — | Not Used |
| 13 | 20A | Brake Pedal Position Switch |
| 14 | 10A or Not Used | ABS Control Module (2002: if equipped with ABS) |
| 15 | — | Not Used |
| 16 | 30A | Windshield Wiper Motor, Wiper Hi/Lo Relay, Wiper Run/Park Relay |
| 17 | 20A | Cigar Lighter, Data Link Connector (DLC) |
| 18 | — | Not Used |
| 19 | 25A | PCM Power Diode, Ignition, PATS |
| 20 | 7.5A | Generic Electronic Module (GEM), Radio |
| 21 | 15A | Hazard Flasher |
| 22 | 20A | Auxiliary Power Socket |
| 23 | — | Not Used |
| 24 | 7.5A | Clutch Pedal Position (CPP) Switch, Starter Interrupt Relay |
| 25 | — | Not Used |
| 26 | 10A | Battery Saver Relay, Auxiliary Relay Box, Restraint Central Module (RCM), Generic Electronic Module (GEM), Instrument Cluster |
| 27 | — | Not Used |
| 28 | 7.5A | Generic Electronic Module (GEM), Radio |
| 29 | 20A | Radio |
| 30 | — | Not Used |
| 31 | — | Not Used |
| 32 | — | Not Used |
| 33 | 15A | Headlamps, Daytime Running Lamps (DRL) Module, Instrument Cluster |
| 34 | — | Not Used |
| 35 | 15A | Horn Relay (if not equipped with Central Security Module) |
| 36 | — | Not Used |
Mazda B-Series 2004 – 2006
| № | Amp Rating | Description |
|---|---|---|
| 1 | 5A | Instrument panel dimmer switch |
| 2 | 10A | Trailer tow park lamps |
| 3 | 10A | Right low beam headlamp |
| 4 | 10A | Left low beam headlamp |
| 5 | 30A | Windshield wipers/washer |
| 6 | 10A | Radio (RUN/ACCY) |
| 7 | 5A | Headlamp illumination indicator (2004–05) / Headlamp switch illumination (2006) |
| 8 | 10A | Restraints Control Module (RCM), PADI (Passenger Air Bag Deactivation Indicator) |
| 9 | 5A | Cluster air bag indicator |
| 10 | 10A | Cluster (RUN/START), 4×4 module (RUN/START) |
| 11 | 10A | Passenger compartment fuse panel (Logic power) (2004) / Smart Junction Box (SJB) (Logic power) (2005–06) |
| 12 | — | Not used |
| 13 | 15A | Horn, Interior lamps |
| 14 | 15A | High beam headlamp, High beam indicator (cluster) |
| 15 | — | One-touch down relay |
| 16 | 30A Cartridge | Power windows |
| 17 | 15A | Turn signals/Hazards |
| 18 | — | Not used |
| 19 | 20A | Center High-Mounted Stop Lamp (CHMSL)/Stop lamps |
| 20 | 10A | Anti-lock Brake System (ABS) module, Brake-shift interlock, Speed control module, Back-up lamps, Overdrive cancel switch, Electronic flasher (turn/hazard) |
| 21 | 5A | Starter relay (2004–05) / Starter relay coil (2006) |
| 22 | 5A | Spare (2004) / Radio (START), 4×4 Neutral sense (manual only) (2005–06) |
| 23 | 30A | Headlamps (low and high beam) |
| 24 | 20A | Radio (2004–05) / Radio battery feed (B+) (2006) |
| 25 | — | Accessory relay |
| 26 | 2A | Brake pressure switch |
| 27 | 10A | Climate control blower relay/blend doors, 4×4 module |
| 28 | 15A | 4×4 module B+ (2004–05) / 4×4 module battery feed (B+) (2006) |
| 29 | 20A | Cigar lighter, Diagnostic connector (OBD II) |
| 30 | 5A | Power mirrors |
| 31 | 20A | Front park lamps, Rear park lamps, License plate lamps (2004–05) / Front park lamps, Rear park lamps, License plate lamps, Dimmer switch, Trailer tow park lamps(2006) |
| 32 | 5A | Brake switch (logic) |
| 33 | 5A | Instrument cluster (2004–05) / Instrument cluster battery feed (B+) (2006) |
| 34 | 20A | Power point |
| 35 | 15A | Power locks |
Engine Compartment Fuse Box
B-Series (2.3L) 2002 & 2003
| # | Amp Rating | Description |
|---|---|---|
| 1 | 50A** | I/P Fuse Panel |
| 2 | — | Not Used |
| 3 | — | Not Used |
| 4 | — | Not Used |
| 5 | — | Not Used |
| 6 | 50A** | ABS Pump Motor |
| 7 | 30A* | Powertrain Control Module (PCM) |
| 8 | 20A* | Central Security Module, Power Door Locks, Remote Entry |
| 9 | — | Not Used |
| 10 | — | Not Used |
| 11 | 50A** | Starter Relay, Ignition Switch |
| 12 | 20A* | Power Windows |
| 13 | — | Not Used |
| 14 | — | Not Used |
| 15 | — | Not Used |
| 16 | 40A** | Blower Motor |
| 17 | 20A** | Auxiliary Cooling Fan |
| 18 | — | Not Used |
| 19 | — | Not Used |
| 20 | — | Not Used |
| 21 | 10A* | PCM Memory |
| 22 | — | Not Used |
| 23 | 20A* | Fuel Pump Motor |
| 24 | 30A* | Headlamps |
| 25 | 10A* | A/C Clutch Relay |
| 26 | — | Not Used |
| 27 | — | Not Used |
| 28 | 30A* | 4WABS Module (2002) / ABS Module (2003) |
| 29 | — | Not Used |
| 30 | 15A* | Trailer Tow |
| 31 | 20A* | Foglamp, Daytime Running Lamps (DRL) |
| 32 | — | Not Used |
| 33 | 15A* | Park Lamp, Central Security Module |
| 34–37 | — | Not Used |
| 38 | 10A* | Left Headlamp Low Beam |
| 39 | — | Not Used |
| 40 | — | Not Used |
| 41 | 20A* | Heated Oxygen Sensors |
| 42 | 10A* | Right Headlamp Low Beam |
| 43 | — | (Resistor) |
| 44 | — | Not Used |
| 45A | — | Wiper HI/LO Relay |
| 45B | — | Wiper Park/Run Relay |
| 46A | — | Fuel Pump Relay |
| 46B | — | Trailer Tow Relay |
| 47 | — | Starter Relay |
| 48 | — | Auxiliary Cooling Fan (2002) / Auxiliary Cooling Fan Relay (2003) |
| 49–52 | — | Not Used |
| 53 | — | PCM Diode |
| 54 | — | PCM Relay |
| 55 | — | Blower Motor Relay |
| 56A | — | A/C Clutch Relay |
| 56B | — | Front Washer Pump Relay |
B-Series (2.3L) 2004 – 2006
| # | Amp Rating | Description |
|---|---|---|
| 1 | 50A** (2004) / 40A** (2006) | Passenger Compartment Fuse Panel |
| 2 | — | Not Used |
| 3 | 50A** (2004) / 40A** (2006) | Passenger Compartment Fuse Panel |
| 4 | — | Not Used |
| 5 | 50A** | Passenger Compartment Fuse Panel |
| 6 | — | Not Used |
| 7 | 40A** | Starter Relay Fuse (2004) / Starter Solenoid (2006) |
| 8 | — | Not Used |
| 9 | 40A** | Ignition Switch |
| 10 | — | Not Used |
| 11 | 30A** | PCM, Engine Sensors |
| 12 | — | Not Used |
| 13 | 30A** | Blower Motor (Climate Control) |
| 14 | — | Not Used |
| 15 | 30A** (2004 only) | ABS (Solenoids) — Not Used in 2006 |
| 16 | — | Not Used |
| 17 | 40A** | ABS (Motor) |
| 18 | — | Not Used |
| 19 | 20A** | Engine Fan |
| 20 | — | Not Used |
| 21 | 10A* | PCM (2004) / PCM Keep Alive Power (2006) |
| 22 | — | Not Used |
| 23 | 20A* | Fuel Pump |
| 24 | — | Not Used |
| 25 | 10A* | A/C Clutch Solenoid |
| 26–32 | — | Not Used |
| 33 | 30A* (2006 only) | ABS (Solenoids) — Not Used in 2004 |
| 34–37 | — | Not Used |
| 38 | 7.5A* | Trailer Tow (Right Turn) |
| 39 | — | Not Used |
| 40 | — | Not Used |
| 41 | 15A* | HEGOs |
| 42 | 7.5A* | Trailer Tow (Left Turn) |
| 43 | — | Not Used |
| 44 | — | Not Used |
| 45A | — | Wiper HI/LO Relay |
| 45B | — | Wiper Park/Run Relay |
| 46A | — | Fuel Pump Relay |
| 46B | — | Washer Pump Relay |
| 47 | — | Engine Fan Relay |
| 48 | — | Starter Relay |
| 49–53 | — | Not Used |
| 54 | — | PCM Relay |
| 55 | — | Blower Relay |
| 56A | — | A/C Clutch Solenoid Relay |
| 56B | — | Not Used |
*Mini Fuses · **Maxi Fuses
B-Series (3.0L and 4.0L) 2004 – 2006
| # | Amp Rating | Description |
|---|---|---|
| 1 | 50A** (2002–04), 40A** (2005–06) | I/P Fuse Panel (2002–03); Passenger Compartment Fuse Panel (2004–06) |
| 3 | 50A** (2004), 40A** (2005–06) | Passenger Compartment Fuse Panel (2004–06) |
| 5 | 50A** (2004–06) | Passenger Compartment Fuse Panel (2004–06) |
| 6 | 50A** (2002–03) | ABS Control Module (2002); ABS Pump Motor (2003) |
| 7 | 30A* (2002–03), 40A** (2004–06) | PCM (2002–03); Starter Relay Fuse (2004–05); Starter Solenoid (2006) |
| 8 | 20A* (2002–03) | Central Security Module, Power Door Locks, Remote Entry (2002); Power Door Locks, Remote Entry (2003) |
| 9 | 40A** (2004–06) | Ignition Switch (2004–06) |
| 11 | 50A** (2002–03), 30A** (2004–06) | Starter Relay, Ignition Switch (2002–03); PCM Relay Fuse (2004–06) |
| 12 | 20A* (2002–03) | Power Window (2002); Power Windows (2003) |
| 13 | 20A* (2002–03), 30A** (2004–06) | Four Wheel Drive Control Module (2002); 4×4 Motor (2003); Blower Motor, Climate Control (2004–06) |
| 15 | 30A** (2004 only) | ABS, Solenoids (2004 only) |
| 16 | 40A** (2002–03) | Blower Motor (2002–03 only) |
| 17 | 40A** (2004–06) | ABS, Motor (2004–06 only) |
| 21 | 10A* (2002–06) | PCM Memory (2002–03); PCM (2004–05); PCM Keep Alive Power (2006) |
| 23 | 20A* (2002–06) | Fuel Pump Motor (2002–03); Fuel Pump (2004–06) |
| 24 | 30A* (2002–03 only) | Headlamps (2002–03 only) |
| 25 | 10A* (2002–06) | A/C Clutch Relay (2002); A/C Clutch Solenoid (2003–06) |
| 27 | 20A* (2004–06 only) | 4×4 Module (2004–06 only) |
| 28 | 30A* (2002–03) | 4WABS Module (2002); ABS Module (2003) |
| 30 | 15A* (2002–03 only) | Trailer Tow (2002–03 only) |
| 31 | 20A* (2002–03), 15A* (2004–06) | Fog Lamps, DRL (2002–03); Fog Lamps (2004–06) |
| 33 | 15A* (2002–03), 30A* (2005–06) | Park Lamp, Central Security Module (2002); Park Lamp (2003); ABS, Solenoids (2005–06); not used in 2004 |
| 38 | 10A* (2002–03), 7.5A* (2004–06) | Left Headlamp Low Beam (2002–03); Trailer Tow, Right Turn (2004–06) |
| 41 | 20A* (2002–03), 15A* (2004–06) | Heated Oxygen Sensors (2002–03); HEGOs (2004–06) |
| 42 | 10A* (2002–03), 7.5A* (2004–06) | Right Headlamp Low Beam (2002–03); Trailer Tow, Left Turn (2004–06) |
| 45A | — | Wiper HI/LO Relay (2002–06, ) |
| 45B | — | Wiper Park/Run Relay (2002–06,) |
| 46A | — | Fuel Pump Relay (2002–03); A/C Clutch Solenoid (2004–06) |
| 46B | — | Trailer Tow Relay (2002–03); Washer Pump Relay (2004–06) |
| 47 | — | PCM Relay (2004–06 only) |
| 47A | — | A/C Clutch Solenoid Relay (2002–03 only) |
| 47B | — | Front Washer Pump Relay (2002–03 only) |
| 48A | — | Fog Lamps Relay (2002); Fog Lamps (2003); Fuel Pump Relay (2004–06) |
| 48B | — | Fog Lamp Relay (2002–06) |
| 53 | — | PCM Diode (2002–03 only) |
| 54 | — | PCM Relay (2002); PCM (2003) |
| 55 | — | Blower Relay (2002–06) |
| 56 | — | Starter Relay (2002–06) |
*Mini Fuses, **Maxi Fuses.
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