fusible links?

I wish I could help you . You claim there is a second fusible link and I'm not one to argue.
I know the one link at the firewall disconnects everyhing inside the car. If you have power to those fuses hot at all times ( horn and brake lights ) that link is good. The row of fuses hot in run gets its power from the ignition switch. The ignition switch gets its power from the first same fusible link disconnect at the firewall. I would start by locating the ignition switch harness connector exiting the column and use a test light to determine whats hot and whats not in the various switch positions. Hope this helps