Well what I'm about to explain happened once only last winter and happened today and still acting up. Its my 2008 Triton enclosed trailer, it has the mini bty for the electric breakaway switch and hauled by an 04 Avalanche. When I am driving the lights flicker when I hit a bump usually, I also think when this happens it is lightly trying to activate breaks also. The rear mounted stop light on my truck will stay on and the red light on the break controller in truck stays on too. I cant' see it being a wiring or ground problem(which obviously it's one or the other) because wiring is completly sealed in trailer and no way for crap to get in it. My little utiliy trailer that I use with the 4 way plug never acts up. What the heck could it be. Could the break controller be malfunctioning the very odd time or is the mini bty in the trailer have something to do with this, charge etc>??? I no it'll be hard to diagnose this here but hoping someone will have some things for me to check that I haven't already. Thanks.