Mercury Grand Marquis 2005 Fuse Box Info
Passenger compartment fuse box location:
The fuse box is located below and to the left of the steering wheel by the brake pedal. Remove the panel cover to access the fuses.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 15A | Cluster, Lighting Control Module (Interior Lighting) |
| 2 | 10A | Ignition (ON) - Electronic Automatic Temperature Control (EATC) module, A/C mode switch (vehicles equipped with EATC) |
| 3 | 10A | EATC module |
| 4 | 10A | Ignition (ON) - Anti-lock Brake System (ABS) module, Positive Crankcase Ventilation (PCV) |
| 5 | 10A | Speed control deactivation switch, Stop signal, Brake-Transmission Shift Interlock (BTSI) (column-shift transmission) |
| 6 | 10A | Ignition (ON) - Cluster |
| 7 | 10A | LCM (Park lamps, Switch illumination) |
| 8 | 10A | Ignition (ON) - Rear Air Suspension Module (RASM), Variable Assist Power Steering (VAPS) |
| 9 | 20A | LCM (Headlamps, Cornering lamps) |
| 10 | 5A | Ignition (ON/START) - Driver’s Door Module (DDM) |
| 11 | 10A | Ignition (START) - ON/ACC relay coil |
| 12 | 10A | Ignition (ON/START) - Starter relay coil |
| 13 | 10A | Ignition (START) - Wiper module |
| 14 | 10A | Ignition (ON) - BTSI (Floor-shift transmission) |
| 15 | 7.5A | Ignition (START) - LCM, Door lock switch illumination, Heated seat switch illumination, Moonroof, Overhead console, Electrochromatic mirror |
| 16 | 15A | Ignition (ON) - Turn signals |
| 17 | 10A | Ignition (START) - Audio |
| 18 | 10A | Ignition (ON) - A/C mode switch (vehicles equipped with manual A/C), Blend door, DDM, Heated seat modules, Daytime Running Lamps (DRL) module |
| 19 | 10A | Left-hand low beam, DRL |
| 20 | 10A | Ignition (ON/ACC) - Back-up lamps |
| 21 | 10A | Right-hand low beam, DRL |
| 22 | 10A | Ignition (ON/ACC) - Restraint Control Module (RCM), Occupant Classification Sensor (OCS), Passenger Air bag Deactivation Indicator (PADI) |
| 23 | 15A | Multi-function switch (Flash-to-pass) |
| 24 | 10A | Ignition (ON/ACC) - Passive Anti-Theft System (PATS) module, Powertrain Control Module (PCM) relay coil, Fuel relay coil, Ignition coil relay coil |
| 25 | 10A | Autolamp/Sunload sensor, Power mirrors, Door lock switches (DDM), Adjustable pedal switch |
| 26 | 10A | Ignition (ON/ACC) - Analog cluster, Warning lamp module, LCM, Overdrive cancel switch, Rear defroster relay coil |
| 27 | 20A | Cigar lighter, OBD II, Power point |
| 28 | 10A | Center High-Mounted Stop Lamp (CHMSL) |
| 29 | 15A | Audio |
| 30 | 15A | Stop lamps, MFS |
| 31 | 15A | Hazards |
| 32 | 10A | Mirror heaters, Rear defroster switch indicator |
| 33 | - | Not used |
| Relay 1 | - | Rear defroster |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 20A | Ignition switch (Key in, RUN 1, RUN 2) |
| 2 | 25A | Ignition switch (RUN/START, RUN/ACC, START) |
| 3 | 10A | Powertrain Control Module (PCM) keep alive power |
| 4 | 20A | Fuel relay feed |
| 5 | 10A | Rear Air Suspension Module (RASM), VASM |
| 6 | 15A | Alternator regulator |
| 7 | 30A | PCM relay feed |
| 8 | 20A | Driver’s Door Module (DDM), Door locks |
| 9 | 15A | Ignition coil relay feed |
| 10 | 20A | Horn relay feed |
| 11 | 15A | A/C clutch relay feed |
| 12 | 25A | Audio |
| 13 | 20A | Instrument panel power point |
| 14 | 20A | Stop lamp switch |
| 15 | 20A | Heated seats |
| 16 | 20A | Daytime Running Lamps (DRL) module |
| 17 | - | Not used |
| 18 | - | Not used |
| 19 | 15A | Injectors |
| 20 | 15A | PCM, Mass Air Flow (MAF) sensor |
| 21 | 15A | Powertrain loads and sensors |
| 22 | - | Not used |
| 23 | - | Not used |
| 24 | 5A | Radio mute |
| 101 | 40A | Blower relay feed |
| 102 | 50A | Cooling fan |
| 103 | 50A | Instrument panel (I/P) fuse box feed #1 (I/P fuses 23, 25, 27 and 31) |
| 104 | 40A | Instrument panel (I/P) fuse box feed #2 (I/P fuses 1, 3, 5, 7 and 9) |
| 105 | 30A | Starter relay feed |
| 106 | 40A | Anti-lock Brake System (ABS) module (Pump) |
| 107 | 40A | Rear defroster relay feed |
| 108 | 20A | Moonroof |
| 109 | 20A | ABS module (Valves) |
| 110 | 30A | Wiper module |
| 111 | - | Not used |
| 112 | 30A | Air suspension compressor |
| 113 | - | Not used |
| 114 | - | Not used |
| 115 | - | Not used |
| 116 | - | Not used |
| 117 | - | Not used |
| 118 | - | Not used |
| 201 | - | Horn relay |
| 202 | - | Not used |
| 203 | - | Ignition coil |
| 204 | - | PCM |
| 205 | - | Not used |
| 206 | - | Fuel |
| 207 | - | Not used |
| 208 | - | Not used |
| 209 | - | Horn |
| 301 | - | Starter |
| 302 | - | Air compressor |
| 303 | - | Blower |
| 304 | - | Power windows relay (RUN/ACC) |
| 501 | - | A/C clutch |
| 502 | - | PCM |
| 503 | - | Horn, Door latch |
| 601 | 20A | Power seats, Lumbar, Decklid |
| 602 | 20A | Power windows relay feed (RUN/ACC) |
