Mine used to do this where the turn sigs would stop working. It tured out to be the pug on just one right hand turn sig grounding out in the plug. I tried cleaning it and everything but that didnt fix it. So I cut it out and put a new plug in and I havent had the problem since. ALL my turn signals would stop working BUT the hazards still worked. I dont know how or why but replacing the one pug fixed it.