Originally Posted by Stanton
The flashers do not need that ground wire. The polarity of them is specific - a quick and dirty bench check will show this.

May not need it, but it's what I was looking for. The one that worked the best didn't make the clicking noise. I didn't want to be driving around with blinkers on and not know it. The one I have make 2 click noises after I turn it off, but I can live with that.