Locating the Fuse Boxes
The 1998 Ford Mustang has two primary fuse boxes. The under-hood fuse box is typically near the battery, on the driver's side. The interior fuse panel is located inside the passenger cabin, often beneath the dashboard or in the kick panel. Refer to your owner's manual for exact placement details.
Understanding the Fuse Diagram
A fuse diagram maps circuits to specific fuses. In the 1998 Mustang, it uses color-coding (e.g., red for 10A, blue for 15A) and amp ratings printed on each fuse. The diagram lists fuse numbers corresponding to functions like headlights or radio. Always match the fuse number to the diagram key, which indicates the protected component.
Identifying Blown Fuses
Visually inspect fuses for a broken wire inside or discoloration. Use a multimeter for accuracy: set to continuity mode and probe both ends. No beep indicates a blown fuse. Common causes in the 1998 Mustang include:

- Overloaded circuits: Excessive accessory use, e.g., aftermarket audio.
- Short circuits: Damaged wiring, often in lighting systems.
Fuse Replacement Steps
Replace a blown fuse only with the same amp rating to prevent damage. Steps:
- Safety first: Turn off the ignition and remove the key.
- Remove fuse: Use fuse pullers or pliers to extract the faulty fuse from its slot.
- Install new fuse: Insert a new fuse of identical rating securely.
- Test: Restart the vehicle to verify component function.
Common Fuse Issues in 1998 Mustang
Frequent problems include:
- Fuse 14 (10A): Often blows for interior lights due to door switch issues.
- Fuse 22 (15A): Associated with cigarette lighter or power port shorts.
- Recurrent failures: Indicate underlying wiring faults; inspect harnesses for fraying.