Towing coupling Leon 5F Electrical problem

Hello guys, I need the help of Leonfahrer with AHK. Best of all those who had no AHK preparation ex factory. AHK was installed by the seat dealer, however my 5F FR was one of the first Leons who had no preparation Bj.01.2013 The following problem I have in my electrics with the AHK, for a 1/2 year. The car does not give me any error message since that the light had to be checked at the back right, but he always did that before. What a The main problem I noticed is that if you turn the light switch on stand-off light (default), the trailer on the right side does not light up. As soon as you turn on the ignition, it also lights up on the right side. Can someone check on his team if that’s what they want? Maybe my STG has a crack after more than 2 years, because also the mentioned error messages that he brought in with each couple earlier are missing. Car stood in the who This week I installed a new STG and the problem still exists. – Ignition off, light switch on stand-off light, light only lights left at the AH – Ignition on, light lights left and right at the AH.