It's possible the 7 way is shorted internally to the battery wire. Or at the junction box behind the A-frame.
I had a TT that all of a sudden the running lights would come on in the middle of the day when it got warm outside. They would go out when it got hot. Then they started staying on all the time. I traced it down to a shorted running light wire to one of the fielding lights. They must've been crossed over when they built it and all of a sudden they shorted together. I had no idea where it was at, but it was in the rear half of he trailer somewhere. I found the wire that fed the fielding lights in a cabinet and cut it, no more all day runnng lights. I did have to run another wire for the interior cileing lights, but that was way easier than trying to find a short.
Wife Kim
Son Brandon 17yrs
Daughter Marissa 16yrs
Dog Bailey
12 Forest River Georgetown 350TS Hellwig sway bars, BlueOx TrueCenter stabilizer
13 Ford Explorer Roadmaster Stowmaster 5000, VIP Tow>
A bad day camping is
better than a good day at work!