Double filament applications include 1157, 3157, and 7443. This is where it gets a little bit tricky. There are three wires: shared negative, positive for dim mode, and positive for brighter/blinker mode. The extra wire means that there is a bit more trial and error involved.
First, tap the load resistors between the most vivid colored wire, which is usually the wire that applies for the brighter/blinker mode, as well as the least vivid colored wire, which is generally the negative wire. This tutorial will demonstrate tapping the resistor between the red and black wires.
After you tap the wires, test the turn signal. If the hyper flash still persists, take the wires out and tap it to the other wire and try again. There is a slight chance that you will have to repeat this step for the third and last time.