Mercury Grand Marquis 2004 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 | Audio, CD changer |
| 2 | 5A | Audio |
| 3 | 7.5A | Mirrors |
| 4 | 10A | Air Bags |
| 5 | - | Not Used |
| 6 | 15A | Instrument cluster warning lamps module, Overdrive control switch, Lighting Control Module (LCM), A/C clutch, Analog cluster |
| 7 | 10A | Driver’s Door Module (DDM), Premium radio |
| 8 | 25A | Powertrain Control Module (PCM) power relay, Coil-on plugs, Radio noise capacitor, Passive Anti-Theft System (PATS) |
| 9 | 5A | Transmission range sensor |
| 10 | 10A | Rear window defrost, Heated mirrors |
| 11 | 5A | Traction control indicator relay (ABS w/traction control only) |
| 12 | 15A | Multi-function switch for turn/hazard lamps |
| 13 | 5A | Radio |
| 14 | 10A | Anti-lock Brake System (ABS), Instrument Cluster |
| 15 | 15A | Speed control module, LCM, EATC blower motor relay, Door lock switch illumination, Heated seat switch, Moonroof |
| 16 | 15A | Reversing lamps, Shift lock, DRL module, VAP Steering, Electronic day/night mirror, Overhead console, Air suspension, Climate control, Heated seat module, Speed chime module (GCC only), DDM, Back-up lamps |
| 17 | 7.5A | Wiper motor |
| 18 | - | Not used |
| 19 | 15A | Brake lamps, Brake signal for PCM, ABS and speed control module, DDM |
| 20 | - | Not Used |
| 21 | 15A | LCM for park lamps and interior illumination, Autolamp/Sunload sensor |
| 22 | 20A | Speed control servo, Multi-function switch for hazard lamps, Brake on/off switch, Feed for IP fuse 19 |
| 23 | 15A | EATC module, Instrument cluster, LCM, Interior lamps, Door lock switches |
| 24 | 10A | Left-hand low beam |
| 25 | 15A | Cigar lighter |
| 26 | 10A | Right-hand low beam |
| 27 | 25A | LCM for cornering lamps and high beam headlamps |
| 28 | 20A | Power windows |
| 29 | - | Not Used |
| 30 | - | Not Used |
| 31 | - | Not Used |
| 32 | - | Not used |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 25A | Audio |
| 2 | 20A | Power point |
| 3 | 25A | Heated seats |
| 4 | 15A | Horns |
| 5 | 20A | Fuel pump module |
| 6 | 15A | Alternator |
| 7 | 25A | Moonroof |
| 8 | 20A | Driver’s Door Module (DDM) |
| 9 | - | Not used |
| 10 | - | Not used |
| 11 | 20A | Daytime running lamps |
| 12 | - | Not used |
| 13 | - | Not used |
| 14 | - | Not used |
| 15 | - | Not used |
| 16 | - | Not Used |
| 17 | - | Not used |
| 18 | - | Not used |
| 19 | 15A | Powertrain Control Module (PCM), Fuel injectors |
| 20 | 15A | PCM, HEGOs |
| 21 | - | Not used |
| 22 | - | Not used |
| 23 | - | Not used |
| 24 | - | Not used |
| 101 | 30A | Ignition switch, Starter motor solenoid via starter relay, IP fuses 7, 9, 12 and 14 |
| 102 | 50A | Cooling fan (engine) |
| 103 | 40A | Blower motor |
| 104 | 40A | Heated backlight relay |
| 105 | 30A | PCM power relay, Diagnostic connector, PDB fuses 19 and 20, A/C clutch relay, Fuel pump module relay |
| 106 | 40A | Anti-lock Brake System (ABS) |
| 107 | - | Not used |
| 108 | - | Not used |
| 109 | - | Not used |
| 110 | - | Not used |
| 111 | - | Not used |
| 112 | 50A | Ignition switch feed to IP fuses 4, 6, 8, 11, 13, 15, 17, 20, 22 and 28 |
| 113 | 50A | Feeds IP fuses 3, 5, 21, 23, 25, 27 |
| 114 | 30A | VAP Steering, Air suspension compressor, Instrument cluster |
| 115 | 50A | Ignition switch feed to IP fuses 16 and 18 |
| 116 | 30A | Wipers |
| 117 | - | Not used |
| 118 | 20A | ABS |
| 201 | - | Horn relay |
| 202 | - | PCM relay |
| 203 | - | Fuel pump relay |
| 204 | - | A/C clutch relay |
| 205 | - | Traction control switch relay |
| 206 | - | Not used |
| 207 | - | Not used |
| 208 | - | Moonroof relay |
| 209 | - | Not used |
| 301 | - | Blower motor relay |
| 302 | - | Starter solenoid relay |
| 303 | - | Air suspension relay |
| 304 | - | Heated backlight relay |
| 401 | - | Not used |
| 501 | - | PCM |
| 502 | - | Not used |
| 503 | - | Not used |
| 601 | - | Not used |
| 602 | 20A | Adjustable pedals, Power seat, Locks, Decklid, Lumbar |
