Jim, I did some poking around last night.
The number one problem is that when I opened up my lights, the bulbs were cracked and filled with water
So there's a good place to start !!
I also found that where my ground became disconnected inside the trailer chassis, was right under the tongue, screwed down with a spayde connector.
So I'm assuming I can re-attach right there ?
What do you mean by a "good vehicle ground" ?
As for the lights, d I have to buy whole new fixtures ? The bulbs are very corroded at the base, and I don't think I'll be able to get just the bulbs out.