defective taillights

I’m not sure if there was anything done to them but since I got my car when ever I turn on my left turn signal it just lights up the left tail lights on then off but when I turn the right turn signal on it does the sequential turn signal for them. Has anyone had this problem and fixed it, is it...

Hey fellow Mustang owners! I own a 2015 GT equipped with the 50 Years Edition package. I had covered them with a tinted vinyl but I realized when I removed the vinyl that the taillight lenses were cracked. One of them isn't too terrible and is barely visible because of its location on the...