Mercury Grand Marquis 1998-2002 uses an engine-compartment power distribution box, an auxiliary relay box and a passenger-compartment fuse panel. The cabin layout changed after 2000, so the 1998-2000 and 2001-2002 panels are shown separately.
For the following generation, use the Mercury Grand Marquis 2003-2011 guide. Although both generations use Ford’s Panther architecture, the fuse numbering is not interchangeable.
Engine-compartment power distribution box
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 20 | Electric fuel-pump relay |
| 2 | 30 | Alternator, starter relay, fuses 15 and 18 |
| 3 | 25 | Radio, CD changer, subwoofer amplifier |
| 4 | – | Not used |
| 5 | 15 | Horn relay |
| 6 | 20 | Daytime Running Lamps module |
| 7 | 20 | Circuit breaker: power door locks, power seats, decklid release |
| 8 | 30 | Air-suspension system |
| 9 | 50 | Fuses 5 and 9 |
| 10 | 50 | Fuses 1, 2, 6, 7, 10, 11, 13 and circuit breaker 14 |
| 11 | 40 | 1998-2000: fuses 4, 8, 16 and circuit breaker 12 |
| 50 | 2001-2002: fuses 4, 8, 16 and circuit breaker 12 | |
| 12 | 30 | PCM power relay, PCM |
| 13 | 50 | High-speed cooling-fan relay |
| 14 | 40 | Heated rear-window relay, fuse 17 |
| 15 | 50 | 1998-2000: ABS module |
| 40 | 2001-2002: ABS module | |
| 16 | – | Not used |
| 17 | 30 | Circuit breaker: cooling-fan relay |
| Relay | ||
| R1 | Relay | Heated rear-window relay |
| R2 | Relay | Horn relay |
| R3 | Relay | Cooling-fan relay |
| R4 | Relay | Air-suspension pump relay |
Auxiliary relay box
| Diode | ||
| 1 | Diode | PCM power |
| Relay | ||
| R1 | Relay | A/C clutch / wide-open-throttle cutout |
| R2 | Relay | Fuel pump |
| R3 | Relay | PCM power |
Passenger-compartment fuse panel – 1998-2000
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | 15 | 1998: hazard lamps, stop lamps |
| 15 | 1999-2000: Brake Pedal Position switch, speed control, multifunction switch | |
| 2 | 30 | Wiper module, windshield-wiper motor |
| 3 | – | Not used |
| 4 | 15 | Lighting Control Module, main light switch – 1999-2000, headlamp dimmer switch – 1998 |
| 5 | 15 | Reversing lamps, Variable Assist Power Steering, turn signals, air suspension, daytime running lamps, electrochromic day/night mirror, shift interlock, EATC, speed-warning chime – 1999-2000 |
| 6 | 15 | Speed control, headlamp switch, headlamp dimmer switch – 1998, Lighting Control Module, clock |
| 7 | 25 | PCM power diode, ignition coils |
| 8 | 15 | Lighting Control Module, power mirrors, remote keyless entry, clock memory, radio memory, EATC, power seats – 1998, power windows, SecuriLock / PATS – 1999-2000 |
| 9 | 30 | Blower motor, A/C-heater mode switch |
| 10 | 10 | Airbag module |
| 11 | 5 | Radio |
| 12 | 18 | Circuit breaker: Lighting Control Module, flash-to-pass, main light switch |
| 13 | 15 | Airbag module – 1998, warning lamps, analog gauges and cluster indicators, electronic automatic transmission, Lighting Control Module, front control unit – 1998 |
| 14 | 20 | Circuit breaker: window/door controls, Driver Door Module, one-touch-down |
| 15 | 10 | ABS, charging indicator – 1998, instrument cluster and transmission-control switch – 1999-2000 |
| 16 | 20 | Cigarette lighter, emergency flasher relay – 1998, auxiliary power point – 2000 |
| 17 | 10 | Power mirrors – 1998, rear-window defrost |
| 18 | 10 | Airbag module, digital instrument cluster – 1998 |
Passenger-compartment fuse panel – 2001-2002
| Position | Rating [A] | Protected component / function |
|---|---|---|
| 1 | – | Not used |
| 2 | – | Not used |
| 3 | Not used | |
| 4 | 10 | Airbags |
| 5 | – | Not used |
| 6 | 15 | Instrument cluster, warning-lamp module, transmission-control switch, Lighting Control Module |
| 7 | – | Not used |
| 8 | 25 | PCM power relay, coil-on-plug ignition, radio noise capacitor, Passive Anti-Theft System |
| 9 | – | Not used |
| 10 | 10 | Heated rear window |
| 11 | – | Not used |
| 12 | – | Not used |
| 13 | 5 | Radio |
| 14 | 10 | Traction-control switch, ABS, instrument cluster |
| 15 | 15 | Speed-control servo, headlamp-switch illumination, Lighting Control Module, clock |
| 16 | 15 | Reversing lamps, turn signals, shift interlock, DRL module, EVO steering control, electrochromic day/night mirror |
| 17 | 30 | Wiper motor, wiper-control module |
| 18 | 30 | Heater / blower motor |
| 19 | 20 | Auxiliary power point |
| 20 | – | Not used |
| 21 | 15 | Multifunction switch, Lighting Control Module, PATS indicator, parking lamps, instrument-panel illumination |
| 22 | 15 | Speed-control servo, hazard lamps |
| 23 | 15 | Power windows/doors, PATS, exterior mirrors, EATC module, instrument cluster, clock, Lighting Control Module, interior lamps |
| 24 | 10 | Left low beam |
| 25 | 20 | Power point, cigarette lighter |
| 26 | 10 | Right low beam |
| 27 | 25 | Lighting Control Module, main light switch, cornering lamps, fuel-tank pressure sensor |
| 28 | 20 | Power windows |
| 29 | – | Not used |
| 30 | – | Not used |
| 31 | – | Not used |
| 32 | 20 | ABS valves |
Commonly checked fuses
- Cigarette lighter / 12 V outlet: cabin position 16 – 20 A on 1998-2000 cars; position 25 – 20 A on 2001-2002 cars.
- Radio: cabin position 11 – 5 A on 1998-2000 and position 13 – 5 A on 2001-2002; under-hood position 3 – 25 A also supplies the audio system.
- Fuel pump: under-hood position 1 – 20 A and relay R2 in the auxiliary relay box.
- Low beams, 2001-2002: positions 24 and 26 – 10 A each.
FAQ – Mercury Grand Marquis 1998-2002 fuses
Why are there two cabin fuse-panel tables?
The passenger-compartment fuse panel changed after model year 2000, so the earlier and later layouts are kept separate.
Where is the fuel-pump fuse?
The main under-hood fuel-pump circuit is position 1 – 20 A. The auxiliary relay box contains fuel-pump relay R2.
Where is the cigarette-lighter fuse?
Position 16 – 20 A on 1998-2000 cars and position 25 – 20 A on 2001-2002 cars.