klenger and Joe, thanks for the suggestions. Everything else works as desired, blinkers, brake lights, trailer brakes, parking lights. I'll see where that wire is going in the trailer and disconnect it since the trailer didn't come wired for reverse lights and at only 16 feet long, my auxiliary backup lights work just fine.
As far as charging, I'd love a nice solar kit, but I can go 6+ days on one deep-cell (dropped down to 12. 15 volts) with this small trailer so the investment isn't worth it. I have purchased a second deep-cell that I carry with me for in the event the first one gets drained and for longer dry camping stays. Someday, when I get a bigger, nicer trailer, I'll save the solar investment for it.
Steve