Ok, I have an 88 Terry travel trailer that I tow with my 02 k1500. The lights worked fine and then all of a sudden one day they were all messed up. First I couldn't keep my tail lights on unless I messed with the bulb every time I started the truck. Then the right blinker wouldn't work and then later when I would turn the blinker on they both would flash. This all happened in a one weekend trip. I got home and removed the stock lights because it looked like some wires may have been touching each other and they were in need of replacing anyway. Replaced the old lights and checked them probably 4 different times while re installing them. They worked perfectly every time. Got them all done screwed in and siliconed up, waited for a few hours and then checked them again and now they don't work!!!! The brake lights are on as the tail lights and nothing else will work. I know it's not my truck because I have another trailer that works fine. What I do not understand is why 5 hours ago they worked and now they don't. Could a bad ground cause this? If so, where would it be on a travel trailer? Please help, getting very frustrated!