I tried installing LED signal (turn and brake) lights on my 57 Buick but can't find the right flasher. I called SuperBrightLights lights but they were no help. I bought 2 solid state flashers, but neither worked. I got a Novita EP35 that did not work, but I found the polarity is wrong. I then got a Novita EP34, which has the correct polarity, but it did not work either. Any suggestions as to which flasher will work? If not, I guess the load resistor is what I need to do.