How to tell if a cartridge fuse is blown without a multimeter?

There are a few ways to tell if a cartridge fuse is blown without a multimeter. Here are some tips:

1. Visual inspection: Check the fuse for any signs of damage, such as a broken filament or discoloration. If there is any physical damage or discoloration, the fuse is likely blown and needs to be replaced.

2. Circuit continuity test: If you don't have a multimeter, you can use a continuity tester or a test light. First, remove the fuse from the circuit and make sure the power is turned off. Then, connect one end of the continuity tester or test light to one end of the fuse and the other end to the other end of the fuse. If the light or tester does not light up, the fuse is blown.

3. Fuse rating: If the fuse is rated for a certain amperage, you can check to see if it is blown by comparing it to a known-working fuse of the same rating. If the fuses look different, or if the blown fuse looks broken or has a broken filament, it is likely that the fuse is blown and needs to be replaced.

Remember to follow safety precautions when working with electrical devices. Always make sure the power is turned off before working on any electrical circuits and use caution when handling fuses. With these tips, you can easily tell if a cartridge fuse is blown without a multimeter and replace it if necessary.