Electrical Trouble

also you make sure the battery terminals are good and the wires themselves are good.

also a way I use to check if my alternator is working is if the car is running i will unhook the battery.....if the vehicle stays running than your alternator is producing current for the electrical system.....if the car dies, your alternator is junk.......this is just a basic test of course and if you want to know the exact out put the alt is producing than you will need to bust out a multi meter like was mentioned above