A short circuit sends current along an unintended path, often because damaged insulation allows a wire to contact metal. Fuses interrupt the surge, so a fuse that repeatedly blows is an important warning rather than an invitation to keep replacing it.
Common Warning Signs
- A fuse that keeps blowing
- Headlights, interior lights, or dashboard lights that flicker
- A burning or melting-plastic smell
- A battery that drains overnight
- Power windows, mirrors, or infotainment behaving erratically