Fuses & Relays: lifespan, maintenance and replacement

Typical lifespan: Lifetime (replace when blown).

Maintenance schedule

• Keep spare fuse kit in vehicle — Always
• Check fuse box diagram familiarity — Once

Signs it needs replacing

• Specific electrical component stops working
• Visible break in fuse wire
• Fuse looks discolored or melted

Tips

Always replace with the same amperage fuse. A repeatedly blown fuse indicates a short circuit that needs diagnosis.