Hey all. I have a trailer that is about 6 months old and the lights quit working this weekend. I noticed that the tail lights weren't coming on but the break lights and turn signals were working. I figured it was the 7 to 4 adapter since the lights and wiring still look brand new (no corrosion) so I went ahead and got a new adapter. Tried the new adapter out tonight and I now have no lights. Tried the "old" adapter and still no lights. I checked the bulbs and they, too, look brand new. No corrosion on the plug or anything. I reconnected the ground wires and all of that...still same deal. I'm completely stumped. I'd like to avoid the standard AppleCare answer of "just replace it" or rewiring so any incite you could provide would be great. I'm hoping it's something simple. Thanks all!