Electrical Issues

Thanks for all the replies. So far I have traced all the wires from the battery back to the fuse/breaker box and made sure all connections were tight. As well as all other wires coming into the box. I checked the reading on the battery and was getting a variety of different numbers (mainly because I'm not sure how to use a meter)Either way, the numbers I got were 12v or 18v depending on what setting I had it on, neither numbers are within the range I was told (13v-14v) I apologize for not being better at describing these things, I know very little about electricity/electronics. If only it was a mechanical problem!