I have described how to fix it multiple times on here and this is EXACTLY how I fixed it. Great pictures! The way the wire was routed through those clips put too much tension in the wire so I just unhooked it from the clips and that loosened it right up.
I can vouch for it working, I fixed it about 600 miles ago and it's still working great
By the way, a suggestion when doing this is to put your hazards on. That way you can constantly see how your turn signal is working as you are working on it. When I loosened the slack it didn't fix it at first, I also had to physically push the wires back into the bulb harness and then the bulb lit right back up to normal brightness