First off thank U for the welcome. I'm a first time Rv'er. I purchase a 1978, 29" Pace Arrow that needed work. I have in working order except the upper marking lights. The center one in the back and front work, but not the others. I have no manuals and have chedcked the fuses (that I can find) bulbs and wiring I can see. Has anyone any ideas or suggestions. I would be very thanful.