Replaced alternator now have no power to key switch

Make sure battery has a full charge and connections all good. Make sure battery ground connection is good. the diagram is for ignition switch, the top two wires are voltage to ignition switch. You can see the two fusible links, you can see where it says battery junction block. One of the positive battery connections should go to battery junction block. You can use test light to check for voltage. As far as testing fusible link, if it will stretch, it's faulty. I can only help with testing.