On our last trip, I flipped on the rope light ambient lighting and a weird thing happened. It lit up on the ends but only very dimly.
Crap, I thought, as I had partially removed the street side cabinet to rewire a new backup camera. I must of pulled something loose. But what? How could it be getting power but be dim? What could I have done?
I have a double wardrobe, and I followed the rope light ends and found I could find how they are wired in two small compartments by taking the covers off in the locker. But connections were fine, wrapped in black tape. What could it be?
Then, I remembered that, in re-wiring the DC plug in the front overhead locker to replace the side panel, I had forgot to kill the 12vdc power, and accidentally shorted it out. The fuse was blown. I replaced the fuse, and then there was light, so to speak, and the rope lights worked normally.
For some reason, there must be some current getting to the rope light even when the fuse is blown. Not much, but it doesn't take much to light LED's.
Try it. Pull the fuse to the rope lights (and the TV antenna amplifier that is on the same circuit), and see what happens.
Weird. You would think that if the fuse was blown, they wouldn't light at all.