Tired of your rear lights working when they feel like it? Go to Radio Shack
and buy one package Cat.# 64-3010, and one package Cat.# 64-3017 (small
machine screws and nuts). Remove your light boards and put one screw through
each of the hollow rivets holding the light sockets. Tighten these down with
a vengence. This improves electrical contact immensly. Fixed mine, try it.
Thanks to the Pacific Northwest Delorean Club! Additional: If your boards are dirty, clean them first. Radio Shack also sells an oxide cleaner that seems to work.