I installed LED headlights and they work great. No blinker issues. I then decided to switch out the rear bulbs with LED bulbs. I made the switch but they wouldn't flash. I then placed the original back but they now wouldn't flash either, just a solid signal light luminated on the dash. I have since placed 1157 LED bulbs in the front and back. Brakes and tail lights work but still no flash. I've replaced the flasher relay to a EL-12 fuse and still no luck. Any suggestions?