Cant find fuse # for brake lights, I dont have manual

Here's a quick easy way to find blown fuses: Open your fuse box and look carefully at the tops of all the blade type fuses and you'll see a little piece of metal sticking up through the plastic on both sides of each fuse. Turn your key on and connect a test light to the negative battery terminal. Now touch the probe side of the test light to both pieces of metal on each fuse. If it lights up on both sides, the fuse is good. If it lights up only on one side, the fuse is blown. If it doesn't light up at all you either aren't making good contact or the circuit isn't powered up. Some circuits only power up under certain circumstances and you probably don't need to worry about it.