Left Blinker Issues

I had a similar situation with my barracuda.........right signal would function in the back, but not the front of the car. Checked all the bulbs, they were good, flasher was good, I replaced it anyway, I have spares. It ended up being a signal wire was pinched underneath the signal housing. I had at some point removed the housing to clean and paint the inside silver, when I put it back in the garage,(too dark), I pinched the wire and didnt see it......never blew a fuse.......all works good now, I had to replace the wire with new........your may be different, but thought I would mention it..........good luck