Turn signals and hazards are not working

I noticed a burning plastic smell when I was using my hazard button. Shortly after, the blinkers started buzzing when I tried to use them and the hazard button would buzz when I pushed it in. My friend removed the hazard button switch relay in the center dash console area, and the part looked and smelled burnt. Replaced with new hazard button, still no results. So then we also replaced the multifunction switch AKA blinker arm, and still have no positive results. We have checked all the fuses and they are still good. Relays seem to be good too. So we have replaced what we can think of and could really use some suggestions? Thanks.