actually there have great relation with the car itself, after install led turn light, it will lighten the load, the flasher will test the lamp filament of turn light are burn out ,  this is a gloss, it lead to speed up the flicker frequency by two times, point out have fault, we usally use the traditional method of External high-power resistance to solve this problem, but the heat productivity of resister is very big,more envload, it can not reach the desired effect.

Now our company tell you a good method: take down the metal wire of fault detect resister in falsher, just use a commutation diode to instead! because the forward voltage drop of diode about 0.6V, it is far more than 0.08V of fault detect, so the fault detect out of work, then the led turn light will not flash faster.