Chevrolet: 87 Chevrolet Celebrity, alternator output, chevrolet celebrity

Question
Hello, my question is regarding a few things, First my battery is really low and i know that i need to replace it. The radio Lights and the in car roof light went out one day and I'm thinking that was a fuse, however today the passenger side headlight went out as well as all of the tail lights, could this be the fuses falling out or getting knocked loose from a lot of bumps? or could it be the battery being low and not powering these items. Please Help. thanks

Answer
James;
HI H.N.Y.- well if the battery is dead nothing will work,  due to the car is a 87 I would check and clean all grounds as a bad ground will make the lights dim or not work at all, same with other things, also check the fan belts, is it tight enough to turn the alternator, than when it is running I would test the alternator output, if it it under 13+ volts say like 12 1/2 that not good it will run the battery down and kill it fast. so you might need a new alternator , only if it is not putting out. it could just be a bad battery.  ok