Br 103- Where Is The Coach Lights Switch?

Just that. Have one for train line power, but can't get the lights on for my poor passengers

 

Beats the heck out of me. Following this thread because I’d like to know as well.

 

Strange, it works for me as it should. First pic after loading service from time table (with train line power on per default), second pic after switching train line power off in the loco. Third ... well.
Maybe a specific service or journey mode?

 

there should be a keybind for coach lights, if not then... well, you're screwed.
but look behind you, it might be on the board there

 

Couldn´t find any switch on the coach panels, like in the n-wagen for example.
On a sarcastic side note: I couldn´t find any passengers either...

 

It seems that the lights are just rather dim, so that they don't really register in daytime. Contrast the 700, which is lit like an operating room!