My flashers were working today with 12.4 volts, well kinda. My left sig works fine but my left still isn't working. The blinker module makes the normal click then a delay then the normal blinker sounds. The right side just makes a kinda grinding sound like it's going super quick. I did put the charger on to see what happens at 14 volts, nothing new.
The way I got them to work was taking the switch all the way apart and using 400 grit sand paper and touching up everything I could see with any sort of grit on it. Just an update to my blinker issue, take a look at your switch.