The issue I had with the trunk was that with the new paint, I couldn't get a good ground to the body for the lights to work. I ended up making a ground wire for each of the marker lights and bolted them to the tail lights.
For the dash, I made the mistaken assumption that since everything worked before I took it apart (over a decade prior), that it would work after putting it back together. The real issue was that the dash dimmer switch was corroded and I had no dash lights. Surprisingly it was an easy fix. I thought I might have had to buy a new one. Was able to clean the corrosion in ~5min with some household chemicals.
