What is the recommended method to test continuity of a fuse?

To test the continuity of a fuse accurately, the recommended method is to ensure that the power is off and the fuse is removed from the circuit. This approach allows for a direct examination of the fuse without any potential interference from the electrical current. By removing the fuse, you can then utilize a multimeter set to the continuity setting or ohms scale to determine whether the fuse is functional.

When the multimeter probes are connected to the terminals of the fuse, a good fuse will allow current to flow, signaling continuity, often confirmed by an audible beep or a reading close to zero ohms. If there is an open circuit, the multimeter will display no reading or remain silent, indicating that the fuse has blown and needs replacing. This method ensures accuracy and safety while testing electrical components.

In contrast, testing a fuse while it is still installed (with power on) risks exposure to live electrical components and may provide misleading results. Measuring voltage across the fuse does not determine whether the fuse itself is intact, as it only indicates if there is voltage present, which does not apply if the circuit is open due to a blown fuse. Using a multimeter while the circuit is powered can also lead to electrical hazards and does not accurately diagnose the fuse's continuity