Driver side rear blinker does not work... driver side front does work.

When I turn the left blinker on it blinks very fast and only the drivers front blinker works and the drivers rear blinker does not. When I use the passnger turn signals they are fine.

I checked the bulb in the rear and it is not burnt out. I checked the fuse and it also is fine. After I reinserted the fuse the blinker in question worked for about a day and now it is back to being a problem.

Could this be a relay problem or something else. Any help would be greatly appriciated.

Chad-

Check the socket with a test light! It sounds like bad ground. Check the bulb by switching it to the passenger side.

I tried the bulb rotation... that worked.
I do not have a light tester readily available. But will get one

If the bulb swap "worked," what was different?
The right bulb works in the left socket? That could still be a problem with the left rear socket, especially if the problem "just started."
Closely examine the two sockets and see if anything is obviously different.