No headlights, fusible link at bulkhead melted…

The diagrams, some hints. Find the fuse panel, page 8-99, and look at the right side of the box marked "battery" the two on the buss. This is your panel hot buss, the stuff like brake lights, tail, hazard, that are always powered. Follow Q3-14R up and left. You will find the big splice we are calling the welded splice. You see R6A-12BK that is coming from the ammeter. If you are unaware, R6 or R6A is the circuit, 12 is the wire size, and BK is BlacK.

If you go up near the top of page 8-98, find the ammeter you will see that black, and on the left, A1-12R, which goes to J in the center group of the bulkhead connector. That is battery power coming inside from the fuse link, and should be the ONLY power coming in to the interior