Toyota 4Runner fuse blows when headlights are turned on on Toyota 4Runner

Some Toyota 4Runner owners report experiencing issues with blown headlight fuses when the headlights are turned on, often due to a short circuit in the headlight wiring caused by damaged or frayed wires making contact with metal parts. Additionally, some owners find that a defective or burned-out headlight bulb can either cause a short circuit or draw excessive current, leading to fuse overload. Furthermore, problems with the headlight switch, such as faults or defects, may result in current spikes that blow the fuse. To effectively resolve these issues, it is essential for owners to identify and address the underlying causes of the overload, ensuring that wiring, connections, bulbs, and electrical components are thoroughly checked to prevent the new fuse from blowing again.