UPDATE: The park/tail/dash lights began to fail again occasionally, and would return by wiggling the fuse. The fuse was getting very, very, hot. It turned out to be that the metal fuse clip itself had become annealed from the heat over the years, and my re-soldering of the lower wire connection. There was no spring tension left in it to bear down on the fuse. It could no longer hold the fuse tightly. I cut two lengths of silicon vacuum hose about 1/4"+ in diameter, and as long as the fuse. I wedged them on either side of the fuse clip, parallel to the fuse. The pressure from the silicon tubing, presses the clip tangs tightly into the fuse for a great connection. No more heat, and reliable lights! I see it as a great temporary solution until I can get a new fuse box.