my left blinker keeps going out, i think its a ground wire

Loose ground, loose connector, very possible. If it worked after you changed the bulb, the socket might be corroded, and messing with the bulb made for good contact for a while.

The socket corroded take buld back out clean socket an put buld grease on it so it don't corrod an go out again. Justin's Auto Repair #8033168636

Mine is the same issue but the new bulb was out I'll a week. For now I'm going to say it could just be a bad bulb. I'm about to change it. It's it goes out again, then I'll know something's up with it and see what's going on with the ground.