Mercury Montego 2005-2007 was a large sedan closely related to the Ford Five Hundred. Both used Ford’s D3 platform, while AWD versions shared important drivetrain architecture with the Ford Freestyle 2005-2007.
The key electrical distinction is between 2005 and 2006-2007. The cabin Smart Junction Box follows the same basic arrangement, but the under-hood Power Distribution Box was renumbered in several places. The two engine-compartment layouts are therefore kept separate.
Fuse-box locations
Passenger compartment: the Smart Junction Box is below the dashboard to the left of the steering wheel. Engine compartment: the Power Distribution Box contains the high-current fuses and relays.
Passenger-compartment fuse panel
| Position | Rating [A] | Protected component / function |
|---|---|---|
| F1 | 20 | High beams |
| F2 | 15 | Interior lighting, delayed accessories – power windows and moonroof |
| F3 | 25 | Central locking and security – power-lock actuators, decklid latch actuator and decklid solenoid |
| F4 | 15 | Adjustable-pedal switch |
| F5 | 20 | Horn |
| F6 | 20 | Audio – subwoofer |
| F7 | 7.5 | Keep Alive Memory: instrument cluster, PCM, climate control, analog clock |
| F8 | 15 | Parking lamps, side marker lamps, trailer-tow protection |
| F9 | 20 | Cigarette lighter, DLC / OBD-II diagnostic connector |
| F10 | 7.5 | Mirrors and memory module, SDARS |
| F11 | 20 | Audio, Family Entertainment System |
| F12 | 10 | Reversing lamps, electrochromic mirror, Reverse Sensing System, trailer-tow protection |
| F13 | 7.5 | Audio |
| F14 | 7.5 | Starter-relay coil, PCM |
| F15 | 10 | Delayed accessory power – driver-window motor logic, moonroof, audio, driver-door-lock switch illumination |
| F16 | 10 | Heated rear-window indicator, heated mirrors |
| F17 | 30 | Heated rear window |
| F18 | 10 | PCM relay coil, brake-shift interlock, PATS immobilizer module, fuel-relay coil, stop lamps, center high-mounted stop lamp |
| F19 | 10 | ABS / traction-control module, AWD module, Reverse Sensing System, heated-seat modules |
| F20 | 7.5 | Instrument cluster, climate control |
| F21 | 7.5 | Restraints Control Module |
| F22 | 7.5 | Electrochromic mirror, compass module |
| F23 | 7.5 | Wiper-relay coil, blower-relay coil, instrument-cluster logic |
| F24 | 7.5 | Occupant Classification System, passenger-airbag deactivation |
| C1 | 30 | Circuit breaker: delayed accessories – front passenger window, rear windows, window-switch illumination and interior illumination |
Engine-compartment power distribution box – 2005
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 80 | SJB fuses – SJB 1, 2, 3, 4, 5, 8 and 12 |
| 2 | – | Not used |
| 3 | – | Not used |
| 4 | 50 | Wiper RUN/ACC relay to PDB, PDB fuses 37 and 38 |
| 5 | – | Not used |
| 6 | 20 | Moonroof |
| 7 | – | Not used |
| 8 | 60 | Engine cooling fan |
| 9 | – | Not used |
| 10 | 40 | ABS pump motor |
| 11 | 30 | Starter |
| 12 | 30 | PCM relay |
| 13 | 20 | ABS valves |
| 14 | – | Not used |
| 15 | – | Not used |
| 16 | 15 | Transmission / traction control module |
| 17 | 20 | Console power outlet |
| 18 | 10 | Alternator |
| 19 | 40 | SJB solid-state circuit supply |
| 20 | 20 | Right HID low beam |
| 21 | 40 | Heated rear window |
| 22 | 30 | Passenger power seat |
| 23 | 30 | Heated-seat modules |
| 24 | 15 | Fog lamps |
| 25 | 10 | A/C clutch relay and compressor clutch |
| 26 | – | Not used |
| 27 | – | Not used |
| 28 | 15 | Fuel-pump circuit – fuel-pump driver module and fuel pump |
| 29 | 80 | SJB power – circuit breaker and fuses 6, 7, 9, 10, 11 and 15 |
| 30 | 30 | Driver-window motor |
| 31 | 20 | Left HID low beam |
| 32 | – | Not used |
| 33 | 30 | Driver power seat and memory module |
| 34 | 30 | Ignition switch to SJB |
| 35 | – | Not used |
| 36 | 40 | Front climate-control blower motor |
| 37 | 30 | Front wipers and washer |
| 38 | 5 | Heated PCV valve |
| 39 | – | Not used |
| 40 | 10 | TCM, EVMV, EVAP canister vent, ESM, heated oxygen sensors, A/C clutch |
| 41 | 15 | PCM, fuel injectors, ignition coils, MAF sensor |
| 42 | – | Not used |
| 43 | – | Not used |
| 45 | – | Not used |
| 46 | – | Not used |
| Relay | ||
| 47 | Relay | Not used |
| 48 | Relay | Fog lamps |
| 49 | Relay | Not used |
| 50 | Relay | Not used |
| 51 | Relay | A/C clutch |
| 52 | Relay | Not used |
| 53 | Relay | Fuel-pump driver module, fuel pump |
| 54 | Relay | Not used |
| 55 | Relay | PCM relay, PDB fuses 40 and 41 |
| 56 | Relay | Starter solenoid |
| 57 | Relay | Front climate-control blower motor |
| 58 | Relay | Wipers |
| 59 | Relay | Not used |
| Diode | ||
| 60 | Diode | PCM |
| 61 | Diode | PCM |
Engine-compartment power distribution box – 2006-2007
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 80 | SJB fuses – SJB 1, 2, 3, 4, 5, 8 and 12 |
| 2 | – | Not used |
| 3 | 30 | Front wipers and washer |
| 4 | – | Not used |
| 5 | 20 | Moonroof |
| 6 | – | Not used |
| 7 | 60 | Engine cooling fan |
| 8 | – | Not used |
| 9 | 40 | ABS pump motor |
| 10 | 30 | Starter |
| 11 | 30 | PCM relay |
| 12 | 20 | ABS valves |
| 13 | – | Not used |
| 14 | – | Not used |
| 15 | 15 | Transmission / traction control module |
| 16 | 20 | Console power outlet |
| 17 | 10 | Alternator |
| 18 | 40 | SJB solid-state circuit supply |
| 19 | 20 | Right HID low beam |
| 20 | 40 | Heated rear window |
| 21 | 30 | Passenger power seat |
| 22 | 30 | Heated-seat module |
| 23 | 15 | Fog lamps |
| 24 | 10 | A/C clutch relay and compressor clutch |
| 25 | – | Not used |
| 26 | – | Not used |
| 27 | 15 | Fuel-pump circuit – fuel-pump driver module and fuel pump |
| 28 | 80 | SJB power – circuit breaker and fuses 6, 7, 9, 10, 11 and 15 |
| 29 | 30 | Driver-window motor |
| 30 | 20 | Left HID low beam |
| 31 | – | Not used |
| 32 | 30 | Driver power seat and memory module |
| 33 | 30 | Ignition switch to SJB |
| 34 | – | Not used |
| 35 | 40 | Front climate-control blower motor |
| 36 | – | Not used |
| 37 | – | Not used |
| 38 | – | Not used |
| 45 | – | Not used |
| 46 | 5 | Heated PCV valve |
| 47 | – | Not used |
| 48 | 10 | TCM, EVMV, EVAP canister vent, ESM, heated oxygen sensors, A/C clutch |
| 49 | 15 | PCM, fuel injectors, ignition coils, MAF sensor |
| Diode | ||
| 39 | Diode | PCM |
| 40 | Diode | A/C clutch |
| Relay | ||
| 41 | Relay | Fog lamps |
| 42 | Relay | Not used |
| 43 | Relay | A/C clutch |
| 44 | Relay | Fuel-pump driver module, fuel pump |
| 50 | Relay | PCM relay, PDB fuses 40 and 41 |
| 51 | Relay | Starter solenoid |
| 52 | Relay | Climate-control blower motor |
| 53 | Relay | Not used |
| 54 | Relay | Not used |
| 55 | Relay | Not used |
| 56 | Relay | Not used |
| 57 | Relay | Front wiper |
| 58 | Relay | Not used |
Commonly checked fuses
- Cigarette lighter / OBD-II: cabin F9 – 20 A.
- Fuel pump, 2005: under-hood position 28 – 15 A, relay 53.
- Fuel pump, 2006-2007: position 27 – 15 A, relay 44.
- ABS, 2005: position 10 – 40 A for the pump and 13 – 20 A for the valves.
- ABS, 2006-2007: position 9 – 40 A for the pump and 12 – 20 A for the valves.
- Console power outlet: position 17 – 20 A in 2005 and position 16 – 20 A in 2006-2007.
The Montego name was replaced by the Mercury Sable 2008-2009 for the 2008 model year.
FAQ – Mercury Montego 2005-2007 fuses
Does the 2005 under-hood layout match 2007?
No. Ford/Mercury changed the numbering from 2006, so the article keeps separate full tables.
Where is the cigarette-lighter fuse?
Cabin F9 – 20 A. It also supplies the DLC / OBD-II connector.
Where is the fuel-pump fuse?
Position 28 – 15 A in 2005, and position 27 – 15 A in 2006-2007.
Can I use a Ford Five Hundred fuse table?
The models are closely related, but individual equipment and assignments can differ. For diagnosis, use the Montego-specific table.