I just had the mopar wiring harness installed on my 2015 JK on Friday. My neighbor installed it for me while I was at work. He said it was a royal pain to get up behind the glovebox to get to the wiring. There are 3 wiring cables and it's the one on the top that needs to be connected. That being said, it is a very clean install and seems to work fine. I haven't hooked it to my motorhome yet but I hooked it up to my truck and the lights work as they should. Initially he had problems as the Jeep dash was blinking "Left blinker light out, Right blinker light out". The harness must not have been connected tightly enough. He was able to reconnect and now all is well. I have seen others have issues with this harness if the connector isn't tight.
Burch