Mercury Grand Marquis 1998 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 | Hazard Flasher, Stop Lamps |
| 2 | 30A | Wiper Control Module, Windshield Wiper Motor |
| 3 | - | Not Used |
| 4 | 15A | Lighting Control Module, Headlamp Dimmer Switch |
| 5 | 15A | Backup Lamps, Variable Assist Power Steering (VAPS), Turn Signals, Air Suspension, Daytime Running Lamps, Electronic Day/Night Mirror, Shift Lock, EATC |
| 6 | 15A | Speed Control, Main Light Switch, Headlamp Dimmer Switch, Lighting Control Module, Clock |
| 7 | 25A | Powertrain Control Module (PCM) Power Diode, Ignition Coils |
| 8 | 15A | Lighting Control Module, Power Mirrors, Remote Keyless Entry, Clock Memory, Radio Memory, Electronic Automatic Temperature Control (EATC), Power Seats, Power Windows, SecuriLock |
| 9 | 30A | Blower Motor, A/C-Heater Mode Switch |
| 10 | 10A | Air Bag Module |
| 11 | 5A | Radio |
| 12 | 18A | Lighting Control Module, Flash-to-Pass, Main Light Switch |
| 13 | 15A | Air Bag Module, Warning Lamps, Analog Cluster Gauges and Indicators, Electronic Automatic Transmission, Lighting Control Module, Front Control Unit |
| 14 | 20A | Window/Door Lock Control, Driver’s Door Module, One Touch Down |
| 15 | 10A | Anti-Lock Brakes, Charge Indicator |
| 16 | 20A | Door lock actuator, Decklid lock solenoid |
| 17 | 10A | Power Mirrors, Rear Defrost |
| 18 | 10A | Air Bag Module, Digital Instrument Cluster |
Engine compartment fuse box:
| Fuse/Relay N° | Rating | Functions |
| 1 | 20A | Electric Fuel Pump Relay |
| 2 | 30A | Generator, Starter Relay, Fuses 15 and 18 |
| 3 | 25A | Radio, CD Changer, Subwoofer Amplifier |
| 4 | - | Not Used |
| 5 | 15A | Horn Relay |
| 6 | 20A | DRL Module |
| 7 | 20A | Power Door Locks, Power Seats, Trunk Lid Release |
| 8 | 30A | Air Suspension System |
| 9 | 50A | See Fuses 5 and 9 |
| 10 | 50A | See Fuses 1, 2, 6, 7, 10, 11, 13 and Circuit Breaker 14 |
| 11 | 40A | See Fuses 4, 8, 16 and Circuit Breaker 12 |
| 12 | 30A | PCM Power Relay, PCM |
| 13 | 50A | High Speed Cooling Fan Relay |
| 14 | 40A | Rear Window Defrost Relay, Also see Fuse 17 |
| 15 | 50A | Anti-Lock Brake Module |
| 16 | - | Not Used |
| 17 | 30A | Cooling Fan Relay |
| Relay 1 | - | Rear Defrost Relay |
| Relay 2 | - | Horn Relay |
| Relay 3 | - | Cooling Fan Relay |
| Relay 4 | - | Air Suspension Pump Relay |
