Led turn signals wont blink. Any help would be great!

I have a 2006 mustang GT and i recently installed 2 stage led turn signals in the front. sometimes they blink perfectly, sometimes they think they are burnt out and the back lights will flash fast. they seem to be right on the edge off that power load enough for the relay to think its a good bulb. is there anything i could do to get them to work properly 100% of the time? If anyone out there has had the same problem and has corrected it. Please, please, any advice would be much appreciated. thanks,