Which of the following symptoms may suggest a blown fuse?

A blown fuse typically leads to the failure of specific electrical components within a system while allowing others to function normally. When a fuse blows, it interrupts the electrical circuit for only the component it protects. Therefore, if certain parts of a vehicle’s electrical system or accessories are not working, this can indicate that the relevant fuse has blown.

For example, if the headlights work but the radio does not, the fuse associated with the radio may be the problem. The symptoms of a blown fuse are often localized to specific systems or components rather than affecting the entire electrical system of the vehicle.

In contrast, other symptoms described do not directly indicate a blown fuse. If all electrical systems function normally, it suggests that fuses are intact. An engine that starts but runs roughly could indicate issues with fuel delivery or ignition rather than a blown fuse. Lastly, smoke odors from wiring point to more severe issues such as a short circuit or overheating, which often results in damage beyond just replacing a blown fuse.