When I load my save I can not add power by throttle (766.2 DBpbzfa DB). Screen in loco does not show any working motor when i add power. If you can help, I will be grateful.
Generally speaking save work most of the time but always. Try restarting and not saving - Pausing the game is ok.
Which route? Some of the 766’s can be a bit temperamental. Check the electric brake is released as I have found that sometimes sticks on despite releasing the train brake. Have you tried doing a physics reset from the pause menu? As a last resort, shut down the cab car and go to the loco on the rear and drive from there, using external view. I’ve had to do that more than once! However this sort of problem and the complete lack of sound and tactile feel is why I hate driving from cab cars and only do so when absolutely necessary, e.g. to advance the Journey mode.
