my truck did not have signals except on front fenders, that may have been added at dealer. there were lot of lights on the rear and none were working. i removed all light got 2 new period style lights for rear. I can get turn sigs and taillamps to work on same circuit but no brake lites. I understand that to get these to work i need separat lites for turn sigs. Brake and tail on one reare light with jumper to other rear. correct? or get new bucket harness to go with new main harness. correct?