1. Headlights Fuse: Protects the headlight circuit, including low and high beams.
2. Tail lights Fuse: Protects the circuit for the tail lights, license plate lights, and parking lights.
3. Dash lights Fuse: Protects the circuit for the instrument panel lights and other interior lights.
4. Radio Fuse: Protects the power supply to the audio system, including the radio and CD player.
5. Power Windows Fuse: Protects the circuit for the power window motors.
6. Horn Fuse: Protects the circuit for the horn.
7. Fuel Pump Fuse: Protects the circuit for the fuel pump, ensuring proper fuel delivery to the engine.
8. Ignition Fuse: Protects the ignition system, including the ignition coil and spark plugs.
9. Starter Fuse: Protects the starter motor circuit, allowing the engine to crank and start.
10. Blower Motor Fuse: Protects the circuit for the blower motor that circulates air in the cabin.
11. Memory Fuse: Protects the circuit that stores radio presets, seat positions, and other personalized settings.
12. Trailer Tow Fuse: Protects the circuit for the trailer towing electrical system, if equipped.
It's important to note that the fuse arrangement and functions can vary slightly depending on the specific model and trim level of your 1998 Mercury Mountaineer. If you need to replace a blown fuse, always refer to the owner's manual or a fuse box diagram specific to your vehicle to ensure you use the correct amperage and type of fuse.