Mercury Grand Marquis (1998 – 2002) Fuse Box Location & Diagrams
The Mercury Grand Marquis (1998–2002) fuse box protects essential electrical systems throughout the vehicle. This guide covers fuse box locations, diagrams, fuse ratings, and protected components to help identify the correct fuse when troubleshooting electrical problems or replacing a blown fuse.
Fuse Box Location
Passenger Compartment Fuse Box
The fuse box is located under the left side of the instrument panel.
Engine Compartment Fuse Box
Fuse Box Diagrams
Passenger Compartment Fuse Box
Mercury Grand Marquis (1998-2000)
| Fuse No. | Amp Rating | Description |
|---|---|---|
| 1 | 15A | 1998: Hazard Flasher, Stop Lamps 1999–2000: Brake Pedal Position (BPP) Switch, Speed Control, Multi-Function Switch |
| 2 | 30A | 1998–2000: Wiper Control Module, Windshield Wiper Motor |
| 3 | — | 1998–2000: Not Used |
| 4 | 15A | 1998: Lighting Control Module, Headlamp Dimmer Switch 1999–2000: Lighting Control Module, Main Light Switch |
| 5 | 15A | 1998: Backup Lamps, Variable Assist Power Steering (VAPS), Turn Signals, Air Suspension, Daytime Running Lamps, Electronic Day/Night Mirror, Shift Lock, EATC 1999–2000: Same as 1998 plus Speed Chime Warning |
| 6 | 15A | 1998–2000: Speed Control, Main Light Switch, Lighting Control Module, Clock |
| 7 | 25A | 1998–2000: Powertrain Control Module (PCM) Power Diode, Ignition Coils |
| 8 | 15A | 1998: Lighting Control Module, Power Mirrors, Remote Keyless Entry, Clock Memory, Radio Memory, Electronic Automatic Temperature Control (EATC), Power Seats, Power Windows, SecuriLock 1999–2000: Lighting Control Module, Power Mirrors, PATS, Keyless Entry Module, Clock Memory, Electronic Automatic Temperature Control (EATC), Power Windows, SecuriLock |
| 9 | 30A | 1998–2000: Blower Motor, A/C-Heater Mode Switch |
| 10 | 10A | 1998–2000: Air Bag Module |
| 11 | 5A | 1998–2000: Radio |
| 12 | 18A CB | 1998–2000: Lighting Control Module, Flash-to-Pass, Main Light Switch |
| 13 | 15A | 1998: Air Bag Module, Warning Lamps, Analog Cluster Gauges and Indicators, Electronic Automatic Transmission, Lighting Control Module, Front Control Unit 1999–2000: Warning Lamps, Analog Cluster Gauges and Indicators, Electronic Automatic Transmission, Lighting Control Module |
| 14 | 20A CB | 1998–2000: Window/Door Lock Control, Driver’s Door Module, One Touch Down |
| 15 | 10A | 1998: Anti-Lock Brakes, Charge Indicator 1999–2000: Anti-Lock Brakes, Instrument Cluster, Transmission Control Switch |
| 16 | 20A | 1998: Cigar Lighter, Emergency Flasher Relays 1999: Cigar Lighter 2000: Cigar Lighter, Auxiliary Power Point |
| 17 | 10A | 1998: Power Mirrors, Rear Defrost 1999–2000: Rear Defrost |
| 18 | 10A | 1998: Air Bag Module, Digital Instrument Cluster 1999–2000: Air Bag Module |
Mercury Grand Marquis (2001 & 2002)
| № | Protected components | Amp |
|---|---|---|
| 1 | Not Used | — |
| 2 | Not Used | — |
| 3 | Not Used | |
| 4 | Air Bags | 10 |
| 5 | Not Used | — |
| 6 | Instrument Cluster, Warning Lamps Module, Transmission Control Switch, Lighting Control Module (LCM) | 15 |
| 7 | Not Used | — |
| 8 | Power Train Control Module (PCM) Power Relay, Coil-on -Plugs, Radio Noise Capacitator, Passive Anti-theft System (PATS) | 25 |
| 9 | Not Used | — |
| 10 | Rear Window Defrost | 10 |
| 11 | Not Used | — |
| 12 | Not Used | — |
| 13 | Radio | 5 |
| 14 | Traction Control Switch, Anti-lock Brakes (ABS), Instrument Cluster | 10 |
| 15 | Speed Control Servo, Main Light Switch Illumination, Lighting Control Module (LCM), Clock | 15 |
| 16 | Reversing lamps, Turn Signals, Shift Lock, DRL Module, EVO Steering, Electronic Day/Night Mirror | 15 |
| 17 | Wiper Motor, Wiper Control Module | 30 |
| 18 | Heater Blower Motor | 30 |
| 19 | Auxiliary Power Point | 20 |
| 20 | Not Used | — |
| 21 | Multifunction Switch, Lighting Control Module (LCM), Passive Anti-theft System (PATS) Indicator, Parking Lamps, Instrument Panel Light | 15 |
| 22 | Speed Control Servo, Hazard Lights | 15 |
| 23 | Power Windows/Door Locks, PATS, Exterior Rear View Mirrors, EATC Module, Instrument Cluster, Clock, Lighting Control Module (LCM), Interior Lamps | 15 |
| 24 | Left Hand Low Beam | 10 |
| 25 | Power Point, Cigar Lighter | 20 |
| 26 | Right Hand Low Beam | 10 |
| 27 | Lighting Control Module (LCM), Main Light Switch, Cornering Lamps, Fuel Tank Pressure Sensor | 25 |
| 28 | Power Windows | 20 |
| 29 | Not Used | — |
| 30 | Not Used | — |
| 31 | Not Used | — |
| 32 | ABS Values | 20 |
Engine Compartment Fuse Box
| № | Protected components | Amp |
|---|---|---|
| 1 | Electric Fuel Pump Relay | 20 |
| 2 | Generator, Starter Relay, Fuses 15, 18 | 30 |
| 3 | Radio, CD Changer, Subwoofer Amplifier | 25 |
| 4 | Not Used | — |
| 5 | Horn Relay | 15 |
| 6 | DRL Module | 20 |
| 7 | Circuit Breaker: Power Door Locks, Power Seats, Trunk Lid Release | 20 |
| 8 | Air Suspension System | 30 |
| 9 | Fuses 5, 9 | 50 |
| 10 | Fuses 1, 2, 6, 7, 10, 11, 13 and Circuit Breaker 14 | 50 |
| 11 | 1998-2000: Fuses 4, 8, 16 and Circuit Breaker 12 | 40 |
| 11 | 2001-2002: Fuses 4, 8, 16 and Circuit Breaker 12 | 50 |
| 12 | PCM Power Relay, PCM | 30 |
| 13 | High Speed Cooling Fan Relay | 50 |
| 14 | Rear Window Defrost Relay, Fuse 17 | 40 |
| 15 | 1998-2000: Anti-Lock Brake Module | 50 |
| 15 | 2001-2002: Anti-Lock Brake Module | 40 |
| 16 | Not Used | — |
| 17 | Cooling Fan Relay (Circuit Breaker) | 30 |
| Relay No. | Description |
|---|---|
| Relay 1 | 1998–2000: Rear Defrost Relay |
| Relay 2 | 1998–2000: Horn Relay |
| Relay 3 | 1998–2000: Cooling Fan Relay |
| Relay 4 | 1998–2000: Air Suspension Pump Relay |
*Mini Fuses
** Maxi Fuses
Additional Relay Box
| № | Relay |
|---|---|
| R1 | A/C WOT Cutout |
| R2 | Fuel Pump |
| R3 | PCM Power |
| 1 | PCM Power (Diode) |
