Mercury Mariner 2005-2007 uses two main fuse boxes: the passenger-compartment fuse panel on the right side of the center console and the Power Distribution Box in the engine compartment. Some assignments differ by model year and engine, especially the rear-wiper and cooling-fan circuits.
The 2.3-liter and 3.0-liter engines use different cooling-fan ratings, and the 2007 rear-wiper circuit differs from 2005-2006. Those variants are retained as separate rows rather than being merged.
For the next generation, see Mercury Mariner 2008-2011.
Fuse-box locations
Passenger compartment: on the right side of the center console next to the instrument panel. Engine compartment: the Power Distribution Box contains the high-current fuses and relays.
Passenger-compartment fuse panel
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 15 | Trailer-tow parking lamps |
| 2 | – | Not used |
| 3 | 15 | Front and rear parking lamps |
| 4 | 10 | Ignition switch |
| 5 | 2 | Powertrain Control Module relay, fuel-pump relay, main fan relay, high/low-speed fan relay 2, PATS module |
| 6 | 15 | Center High-Mounted Stop Lamp, stop lamps, PCM, ABS, speed control, Brake On-Off switch |
| 7 | 10 | Instrument cluster, diagnostic connector, power-mirror switch, radio |
| 8 | 5 | 2007: EVAP canister vent |
| 9 | 30 | Power door locks, power seats |
| 10 | 15 | Heated mirrors |
| 11 | 15 | Moonroof, electrochromic mirror, compass |
| 12 | 5 | Radio |
| 13 | – | Not used |
| 14 | – | Not used |
| 15 | 30 | Power windows |
| 16 | 15 | Subwoofer |
| 17 | 15 | Low beams |
| 18 | 10 | 4WD |
| 19 | – | Not used |
| 20 | 15 | Horn |
| 21 | 10 | 2005-2006: rear-wiper motor, rear-wiper washer |
| 15 | 2007: rear-wiper motor, rear-wiper washer | |
| 22 | 10 | Instrument cluster |
| 23 | – | Not used |
| 24 | 20 | Cigarette lighter |
| 25 | 20 | Front-wiper motor, front-wiper washer |
| 26 | 5 | Climate-control system mode switch |
| 27 | 5 | 2005-2006: canister vent; speed-control cancel switch |
| 28 | 10 | Instrument cluster |
| 29 | 10 | Reverse parking aid |
| 30 | – | Not used |
| 31 | – | Not used |
| 32 | 10 | Brake-transmission shift interlock |
| 33 | 15 | Airbag module, Passenger Airbag Deactivation indicator, Occupant Classification Sensor |
| 34 | 5 | ABS module, Evac and Fill, speed control |
| 35 | 5 | Heated-seat module, 4WD |
Engine-compartment power distribution box
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | – | Not used |
| 2 | 25 | Headlamp power |
| 3 | 25 | High beams, turn signals, interior lamps, headlamp power |
| 4 | 5 | Keep Alive Power |
| 5 | 15 | Heated Exhaust Gas Oxygen sensors |
| 6 | 20 | Fuel pump |
| 7 | 40 | RUN/ACC relay – electrochromic mirror, cigarette lighter, front and rear wipers, compass |
| 8 | 30 | Powertrain Control Module, fuel injectors and ignition coils |
| 9 | 15 | Alternator |
| 10 | 30 | Heated seats |
| 11 | 10 | PCM |
| 12 | 20 | Power outlet |
| 13 | 20 | Fog lamps |
| 14 | 15 | A/C clutch, A/C relay |
| 15 | 30 | ABS solenoid |
| 16 | 25 | Instrument-panel fuse panel – RUN/START |
| 17 | 50 | Main ignition |
| 18 | 40 | Blower motor |
| 19 | 40 | Accessory-delay relay – subwoofer and 4WD, low beam |
| 20 | 60 | ABS |
| 21 | 40 | Horn, CHMSL, instrument cluster, power locks and power seats |
| 22 | 40 | 2.3 L: cooling fan |
| 50 | 3.0 L: cooling fan | |
| 23 | 40 | Rear defroster, parking-lamp relay |
| 24 | 40 | 2.3 L: high/low-speed cooling fan |
| 50 | 3.0 L: high/low-speed cooling fan | |
| 25 | – | Shunt |
| Relay | ||
| R2 | Relay | PCM |
| R3 | Relay | Fuel pump |
| R4 | Relay | Cooling fan |
| R5 | Relay | High/low-speed fan 1 |
| R6 | Relay | Blower motor |
| R7 | Relay | Starter |
| R8 | Relay | High/low-speed fan 2 |
| R9 | Relay | Fog lamps |
| R10 | Relay | A/C |
| Diode | ||
| D1 | Diode | Not used |
| D2 | Diode | A/C diode |
Commonly checked fuses
- Cigarette lighter: cabin position 24 – 20 A.
- Diagnostic connector: cabin position 7 – 10 A, together with the instrument cluster, power-mirror switch and radio.
- Fuel pump: under-hood position 6 – 20 A, with relay R3.
- ABS: under-hood position 20 – 60 A plus position 15 – 30 A for the solenoid circuit.
- Front wiper: cabin position 25 – 20 A.
- Rear wiper: cabin position 21 – 10 A for 2005-2006 and 15 A for 2007.
FAQ – Mercury Mariner 2005-2007 fuses
Where is the cigarette-lighter fuse?
Cabin position 24 – 20 A.
Where is the fuel-pump fuse and relay?
The fuel pump uses under-hood position 6 – 20 A and relay R3.
Why does position 21 have two ratings?
The rear-wiper circuit uses 10 A on 2005-2006 vehicles and 15 A on 2007 vehicles.
Are the cooling-fan fuses the same for the 2.3 and 3.0 engines?
No. Positions 22 and 24 are rated 40 A for the 2.3 L engine and 50 A for the 3.0 L engine.