need help with blinkers?????

I took out my relay and even found the correct resistor labeled (R1). I bought a 68 ohm resistor and put it on the relay and all I got was a solid turn signal that sounded like it was going to blow up. I wonder if there is something I am missing about this. Is the resistor the right size or what. I want the blinkers to be just under 2 times faster. I replaced my rear lights with LEDs and now for some reason they are dim when the lights are on. I think these two things are unrelated, but why are my LEDs dim and what resistor will it take to speed up the blinkers?