The lights were put on that trailer about fifteen years ago. They had become problematic, in that age and weather had caught up with them. You never knew if you'd have trailer lights or not. Fortunately, trailer lights are available everywhere, so I went to the store and got some new LED trailer lights.
The bolts holding the lights on were rusted, but I own a Saws-all. In about fifteen minutes the old lights were off the trailer. In another thirty minutes I had installed and tested new lights.
Now, we've got new, waterproof LED lighting on the back of the trailer. I'll be safe pulling it down the road.
I had some boards on the floor of the trailer that were warped, in need of replacement. The Saws-all again came into use, cutting those rusted bolts as well. Those bolts responded to the saw, and everything is loose. Tomorrow, I'll go to the lumber yard and see about some new floor boards for the trailer.
This is the "before" shot. I'll keep you updated. Oh, and in this post, Unknown commenter told me that Harbor Freight sells big, undyed drop cloths. Thanks! I'll have to look into that. An undyed fabric will look better than a blue or silver tarp. Thanks for the heads-up.