I have owned 2 gooseneck trailers, a race car trailer, 30' tongue pull travel trailer, 42' 5th travel trailer 24' car hauler, and 3 16' utility trailers. The travel trailers pigtail have always been an issue until they are clocked correctly. I was more talking of the clocking of the wires to work correctly. To me makes no difference about the color. I have no idea why some RV or other trailer group came out with the RV pin out. Why can't everything just be the standard 7-way. I have come across this with the last 5th wheel I pulled and rewired the trailer plug to match my trucks. My F-350, 2500HD and my new GMC 1500. I have learned over the years to verify the trailer is done correctly from 4-way, 5-way and 7-way. Hate the 5-way cause it seems to be a bastard for any trailer plug.