Summarize this article:

Many cars have 2 or more fuse boxes, but there's no universal standard for their placement. Most manufacturers place them near the car’s engine or battery, beneath the steering wheel, or inside the glove box. Look for a gray or black box; it may be labeled as “Fuses.” Check your car’s manual if you have trouble finding the fuse boxes. If you don’t have your manual, search online for “fuse box placement” plus your car’s year, make, and model. Lift the latch on the side of the fuse box to loosen the cover. Check the inside of the lid for a diagram of the devices each fuse controls. Your manual may also include a diagram but, if all else fails, you can also find information on your specific vehicle online.  The diagram will also list the fuse’s amperage, which you’ll need to know to purchase a replacement. Be sure to turn your car off before troubleshooting the fuse box. Some cars and fuse replacement kits include small plastic fuse pullers, which you can use to pluck the fuse from the box. If you don’t have fuse pullers handy, a pair of tweezers will do the trick. In a pinch, you can also carefully pull the fuse from the box with your fingers. Make sure your car is completely off before you pull out the blown fuse. Keep the keys out of the ignition to avoid accidentally putting it in “Run” or “Accessories” mode. Otherwise, you could get a nasty shock. Car fuses are small, so it’s a little tougher to find signs that one blew. Hold it up to the light and look closely inside for a thin wire that connects the 2 sides of the fuse. If the wire is broken, or if you see charred marks, the fuse has blown.  If the wire is intact and the fuse seems fine, double-check your diagram to ensure you have the correct fuse. If you've checked each fuse individually and none have blown, your car’s electrical system may need a mechanic’s attention. If you’re not able to visually tell if the fuse has blown, then you may need to check the fuses with a multimeter to determine if it’s working. Head to an auto shop or major retailer's automotive department to find fuses for your car. Bring the blown fuse with you to ensure you get the right match. Once you’ve purchased the right replacement, simply insert it into the slot where you removed the blown fuse.  Make sure the car is off before you set the fuse into the empty slot. Press down with a little pressure until it pops into place. Car fuses are color-coded, so if the fuses are a different color, you know right away they aren’t a match. Additionally, be sure the prong shape of the new fuse matches the old one. If necessary, ask an employee at the store for help finding the right replacement.
Look under the hood or dashboard for your vehicle’s fuse box. Find the fuse that controls the device that’s stopped working. Remove the blown fuse from the box using fuse pullers or tweezers. Check the fuse for a broken filament or discoloration. Install a new fuse with an amperage that matches the one that blew.