Going to tourney early saturday a.m. trailer lights went out as I went over some railroad tracks on the highway.I got them to flicker once but they would not stay on.I had brake and turn signals.Checked all fuses,all is ok,wired in new male/female plugs for the trailer,still only have brake and turn lights.Is it possible that the ground on my truck is bad?If the ground was bad would I still have brake/turn lights?Also no clearance lights working,have never had a problem with this before except for a bulb once in a while.