Assuming you're referring to a car fuse panel, the process will be different depending on the make and model of your vehicle. However, most cars will have the fuse panel located under the dash on the driver's side. In some cases, it may be located in the glove box or console area.
To access the fuse panel, you'll need to remove any trim pieces that are blocking it. This can usually be done with a screwdriver or pry bar. Once the trim is removed, you should see a diagram of which fuses control which circuits. If there is no diagram, consult your owner's manual for more information.
Once you've found the desired fuse, use a needle-nose pliers to remove it from its socket. You can then check to see if the fuse is blown by looking at it through a lighted magnifying glass. If the wire inside is broken or burned, then the fuse needs to be replaced.