[TKCR]

Usually if your getting the hyper flash with the blinker bulbs, one of the bulbs is bad. If you swap out all the bulbs and your still getting the hyper flash, then on of the connectors for the lights is bad.
I had that on my truck when I first got it. I changed out all the bulbs, but I ended up changing out the connections for the marker lights in the grille, and that fixed it. Someone had poorly spliced them in, plus the connectors themselves just looked bad. Like they had gotten pretty hot at one time or another.