I have a 2006 Ford F350 with tow command. The prior short time owner installed an older 6 wire round style trailer connector in the box and on the bumper for a goose neck trailer. Today I decided to build an adapter to go from the old style 6 wire round to the 7 wire large OEM type plug now being used on late models for the box plug. No matter how I wired it, the tow command came back as "trailer not connected" on the tow command readout. Now the large 7 wire on the bumper works fine on my trailer. Why can't you use an adapter from a 6 wire type plug to a 7 wire on the Ford tow command? I guess I will just have to convert the box plug over to the new 7 wire style plug and say to he_ _ with trying to use an adapter. I know it has something to do with a small amount of electrical signal sent to the trailer to confirm it is hooked up and wired properly. I just don't understand why the adapter failed to communicate the same way between truck and trailer. Has anyone else seen this problem or have an answer?