Adapter for 7 pole rv to 4 pole round?

Since the present hookup is not working right, worrying about color coding on the jeep side is probably futile. Just cut the wiring. Take a spare battery and ground it to the jeep frame with a jumper cable. Use a test light hooked to the positive battery terminal to probe the 4 wires. When you get continuity without any glow from the parking lights, you have identified the ground wire. Then use a jumper cable from the positive battery terminal to identify the remaining 3 wires. Park, left turn and right turn should be obvious.