if i just use a 4 way wire harness and hook into the 8 wire harness up under the rear bumper will i have brake lights on the trailer? cause the only wires i will be hooking up are the white (ground) brown (running lights) yellow (left turn) green (right turn)

 

Please do not double post your questions. I have already responded in two other threads you have posted in. No need to create another.