Very few use them in Knoxville...frustrating.

 

Am I wrong? I thought all 3rd lights were simply set to OFF when you buy 05-09. I got the sequential lights a long time ago and loved that the 3rd light (Left & Right) now both work in Park mode and of course when braking. So, therefore I expect to see those lights never lit on most Mustangs. Some of you may be talking about the middle "third" Brake light but I'm talking about the three tail lights on both left and right.

 

At least one of them was talking about the center high mount stop light (CHMSL)...i.e. the one thats in the top center of the decklid

 

Bingo.