Hi, this is my first post, I own an Audi A6 C6 Avante 2010 model

On the car I have an Audi retractable tow bar with 13 pin continental light socket. When I bought the car and added a 7 pin conversion, my lighting board worked fine. However, I now find that I have no lighting board lights. Also there is an issue with the rear quarter LED light within the right wing which is intermittent (sometimes dull or not working), but the indicator still works. Not sure if this is related

I have checked the converter socket, car socket and lighting board socket, and all look good. There was no indication of the problem as in the evening it worked and in the morning it did not

I have failed to find any guidance on the web and would appreciate feedback on what steps I can take to rectify the problem/check the problem

Await comments with interest