fusible links?

i have about 12.5 volts on the battery. And on both sides of the relay. would the starter turn with a jumper wire if the relay was bad? and i havent checked the grounds but it was running before so i assume they are good but i will check in the morning. does anyone think it could be the fusible link?Thanks for the input all the help is greatly appreciated. Im just a young gun trying to learn the tricks of the trade!lol