Wouldn't the third brake light flash with the turn signal, since most Mustangs use the brake circuit for the turn signal?
I think there are trailer adapters that can separate the brake from the turn signal, but I have no idea on how they work.
The only time I have ever been rear ended was when the 3D brake lamps first came out. I was in a two day old '86 TBird.
Dynacorn 67 fastback. Dart 363, Close ratio Magnum 6 speed, 3.70 Eaton Truetrac, SorT suspension. Still in pieces.
'14 SHO with most all the bells and whistles. Stock for now.