On a drive out to Galena with my recently purchased 73 240Z, my dashboard lights went out suddenly. Then about 5 minutes later I got pulled over and found out my tail lights were out too. I saw a thread with this discussion before but couldn't find it again. So I am posting what I found. The headlights still worked. I changed out the tail light fuse. Didn't work. Then I read sometimes the fuse box gets rewired and monkeyed with so that the labeled fuses aren't always right. so I changed out all of the fuses. Didn't work. After much searching up and down the wires from the tail lights up under the dashboard and into the engine compartment, I narrowed my search. If the headlights still work, but the tail lights and dashboard lights are out, it must be somewhere near the switch, by where the three triverge. I removed the plastic steering column cover, found the coupling for the headlights. Then, right under my nose, near the light switch/wiper arm, there is a little circuit board with 4 or 5 soldered wires. A green wire came undone. I tested it by tapping it down. My girlfriend confirmed that they were coming on. Bingo, presto, eureka. I soldered it down, and now tail lights work and dashboard lights work as well. This solution was not posted on the previous thread I had found, so I wanted to let anyone with a similar problem have a possible solution. I have heard that on longer drives these kinds of connections come undone often from the vibrations and shaking. There you have it. Greg