Well, this was interesting. I hated how slow my Tridon EL-12 (or is it a EL-13) blinks. So, while I was pulling my dash out I tried my hazard lights since I've never tried them with the LED's in the back. Well, they work and blink fast (ie, normal speed). Not to mention you can hear the relay click. So if you have a YJ with LED's, you might want to try using a Wagner 552 relay instead. It's an easy swap since technically you already have one!