On the way home from fishing tonight the parking lights on my trailer both went out at the same time. Still have brake lights and turn signals. Checked/cleaned all connections. Checked/cleaned and re-attached ground wire. Traced wires to check for exposure. Made sure nuts and the back of the lights were tight and dug in. I never usually have problems figuring out what is wrong with my trailer lights, but I haven't been able to solve this one. What would cause me to lose both at the same time. By the way, the parking lights on the truck still work so it's not a fuse thing. Thanks for any input.