Running lights always on

Ok. I reread the OP. It sounds like it was hard wired at the junction box. Just remove the wire and tape it off. Or use it and install your own switch so you can turn them on when you want.

The easiest place to do this is inside the seven way plug ! Some dealers will do this at shows .

I installed a switch on mine so I could turn them on when camping. Just enough light to light walk around and not bother any neighbors. Not to mention if it was pitch black out and I took the dogs for a walk I could see the trailer on the way back!

And before I did the switch, I used a 15A blade fuse with the blades bent just a bit and slid this into the connector. The running light circuit and battery circuit are right next to each other. Very easy to make the lights come on. And if you have an old school flasher you can plug that into it and make the lights flash. Good if your broke down on the side of the road and need to leave the trailer.....and perfect to upset the neighbors!!!!

One of the pins of the 7-way should be connected to your RV battery and is used to charge from the tow vehicle. If the striped wire you're referring to is actually connected to the pin for the running lights, then I agree, disconnect and cap it off.

Just make sure it's not really a charge wire with a short somewhere between the charge line and running lights. Since it's on an interior light fuse, I suspect it's not supposed to be there as others have suggested.

Thanks all for the input. I'll report back with what I find.

Some clowns re-wire the connector so the lights stay on while camping. Useless trend in my opinion.

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.

Another reason not to buy an RV that was in a show.

They used to place a jumper or flasher in the plug from the charge line to the running light terminals. If you can trace those back to a junction block upfront you may find a temporary connection. Or, there could be a short of some sort in the plug or further back. That should have nothing to do with anything in the power center fuses because the wiring of the exterior lights does not go through the power center.

Sounds like it is re-wired for display at rv show.
It may need to be re-wired at junction box.
Will take a little time and aid from helper.