Hey everyone I'm hoping I can fi d out so.e answers here. I have a 2011 Freightliner Coronado with a Cummins ISX. I'm have trailer brake light issues. 8ve hooked to several trailers just to make sure the problem was in my truck. Whenever I have my parking lights or headlights on and I hit the brakes my trailer brake lights stick on. If I hit my marker interrupt switch or turn on my 4 ways the go off. The tractor brake lights don't stick 9n its only the trailer. Is this a wiring issue or a bad switch or relay somewhere? Thanks in advance for any and all help!