3-25-2007 Update
Tail panel with auxillary brake lights and back-up lights for camera. The round lights are the back-ups.
The lower tail lights will come on as soon as hydraulic pressure builds up in the system. These lights are tied into the on-board battery bank.
On a typical trailer the breakaway switch activates the brakes but no warning is given to the vehicle behind the trailer.

Separation from a tow vehicle also means loss of all external lighting.