Floor pans look fine, just surface rust from what I can tell which isnt a big deal for a 30+ year old car. The proper solution for it will vary depending on how original and correct you want to keep the car. I took a lot of pictures of mine to prove that is was in good shape and POR15 the whole thing.
I agree to not throw a new harness at the problem unless the original harness is in questionable shape right now.
I am happy to say that I Finally have those dam tail lights working! What a relief that is, now we can finish up on the interior and move forward. I think if it wasn't for Those DAM KICK PANELS especially the drivers side panel I would have never figured it out. So far those DAM KICK PANELS have been the worst!
As I was working the DAM DS KICK PANEL out and removing the emergancy brake unit I got a good look at the fuse box...all rusted and looking very tired. So I cleaned up took a small brush to the prongs and installed aLL new fuses...well....there ya go.