Hey guys i have a 2010 mustang gt premium. But the sequential turn signals do not work. And bith turn signals blink fast and all at the same time. I checked every bulb and the fuze. Why doesn’t the sequential work?

 

did you find and answer?

 

I know I'm late to the party, but did you put LEDs in the front turn signals? If so, swap them out for canbus compatible ones. The first set of LEDs I put in the front made them flash too fast and disabled the rear sequential. I swapped to a canbus compatible set and the problem went away. To double check for any bulbs out, turn on the hazards and walk around the car for one that isn't flashing that should or is out completely.