Trailer connection direction indicators are dead

[TnTkr]

My old trailer created a short circuit on blinker wiring. After that both blinker pins on my 2019 Jazz trailer connection stopped working. In the car blinkers work flawlessly. Is there a separate fuse for trailer connection blinkers of where could the fault be? Jazz's fuse logic is almost non-existent, and fuse boxes are scattered around the vehicle so plain old-fashioned "check the fuses" needs some specifying. Or is there a separate controller, which got damaged?

[Marco1979]

In my mk3 Jazz there was a small box in the booth connected to 12V and to the left and right tail lights. The output of this box was a 7 or 13 pin trailer cable. So maybe that box needs to be reset or might be faulty.
Good luck!

[TnTkr]

Thank you! Can you remember where the box was located?

[Marco1979]

When you remove the bottom cover, it should be left or right from where the spare goes. It looks like this: example.