I was originally taught to raise the trailer as high as it would go til the raised light illuminated on the tug. After a long time of us all doing it like that, terberg then said that light is the over raised position light and that trailers should only be raised as high as required to clear the ground and only on level ground. If on undulating yards then raise trailer wind legs up and drop back down to travelling height.
So either I was taught wrongly in the first place or terberg talk ■■■■■■
I’ll let people guess what’s the actual truth.