To tell if a fuse is blown, you can use the following methods: Visual Inspection:

• Look for a broken or melted metal strip inside the fuse.
• Check for discoloration, such as blackening or cloudiness inside the glass casing.
• Notice any burn marks or a burnt smell near the fuse box.
• A blown fuse often has a visible break in the filament or a dark residue inside the fuse casing

Testing with a Multimeter:

• Turn off the power before handling the fuse.
• Remove the fuse from its holder.
• Set the multimeter to the continuity or resistance mode.
• Touch the probes to each end of the fuse.
• If the multimeter beeps or shows low resistance, the fuse is intact.
• If there is no beep and the meter shows infinite resistance (often displayed as "OL"), the fuse is blown

Signs of a Blown Fuse in Use:

• Loss of power to a specific device or area.
• Electrical components like lights, radio, power windows, or other accessories stop working.
• Flickering or dimming lights.
• A burning smell near the fuse box

Always ensure safety by turning off power before inspecting or testing fuses. If unsure or if fuses blow repeatedly, consult a professional electrician to diagnose potential wiring or electrical faults