All fixed, at least found the problem.
So first, yes I got the maintenance manual and wire diagrams, which showed that rear running lights on fuse #22 also are connected to front running lights, which are the signal lights, or blinker lights.
The blinker/direction lights work left/right, but together with backs as running parking lights do not.
So here is the issue.
I had installed LEDs in all positions, but to avoid hyper flashing I had to use resistors. And after I had installed the ones for the front the fuse blew. So after I removed the resistors the hyper flashing was back the fuse did not blow anymore. So these cables additions caused the short.
So we are back up and running, with hyper flashing, but at least with rear lights now working again.
Thanks all for your support.
Now what I need to try to resolve is finding LED solution for front to avoid hyper flashing, without cause short, while using LEDs, which seems not that easy for this model.
Anyway, all set with this issue.