Originally Posted by CavityCr33p
They are called "in-line" fuses. Therefore they go inline. Imagine a hot wire going from your device to the battery. Cut it. You now have to loose ends. They attach to each end of the in-line fuse. Direction doesnt matter. You still have to ground the device. Do not connect the grond and the hot together via the inline fuse. That will result in a blown fuse. I recomend this for you.
or this one http://www.radioshack.com/product.as...ct%5Fid=28-280
I think we should try to get these available at the mp3car.com store. They are very useful training tools. They are made for kids but believe me, we could all learn something from them.