Hello, I have recently had problems with my lighting system! Only the turn signal started to race on the left then occasionally on the right! Then the control light went on for the fog light and could not be switched off after a few turns off! Then loud buzzing noises came from the back left when I press the turn signal! When the engine turned off, the control light for the fog light lit up for quite some time! I changed the light switch on the steering wheel and changed the S clipper for the rear fog lamp! Didn’t help anything except that the control is out! Now the dipped-beam also no longer works! Who has an idea where to look? I suspect humidity but where? Towing hitch ? Greetings Olaf