No headlights, fusible link at bulkhead melted…

67Dart273 said
This varies year to year, but it shows the general plan. Power from the batt goes through the RED, fuse link, through the bulkhead connector, and to the ammeter. Through the ammeter, out on BLACK, and a few inches from the meter, a WELDED SPLICE branches off to feed the fuse panel hot buss, the key, the headlights ONLY power to the light switch.
View attachment 1716283351

Im not sure Im understanding the flow of current, you are saying that it flows from the battery through the red towards the interior, but the diagram shown here shows it flowing towards the battery, and the alternator supplying the current to the welded splice. I must be missing something basic here.
@67Dart273 not questioning you at all, just trying to learn :)