Ground Issue???

So I finally resolved some issues on the 67 dart. New headlight sw-cluster lights went out, found dash wasn't grounding properly so removed and ground new sw and cluster. Resolved. Replaced brakelight sw but still having an issue with the drivers side blowing the turn/brake part of the bulb. Running lights work on both and both front turns are good. I replaced the lens due to a few holes in plastic and didn't see any wires that looked like they had bare copper showing or shorting around the light area. Side note also replaced dimmer sw due to stuck plunger. Thanks for the help.