1983 Chevy Camaro fusible links

I have a blown fusible link at the starter. It is the one to the ignition switch. I read that it has to be caused by a dead short. I connected an ohmmeter to where the link was blown and fto chassis ground. I found 5.3 ohms resistance. I turned the key on and nothing changed. Next I disconnected items one at a time and nothing seems to change except the alternator. Then it becomes open. Does this indicate an alternator or regulator problem?