Yes, thanks. I could try the brakes with a wheel jacked up-- that is worth a try. I do know you have to be moving for the inertia sensor to operate, but AFAIK the manual slider should still make the brakes work.
I did notice this at first while moving and the manual slider did nothing, where it used to stop the truck and trailer with no truck brake on. Using the truck brakes stops everything just fine so I don't know if the trailer brakes work or not. I would have thought the truck would have a hard time stopping with no trailer brakes, but maybe not!
With the 5er it may not show where with a TT it might jack-knife? Yipes.
