I had a similar issue, when I posted on it Doghead suggested grounds. I started with the front left TS socket, thats where my issue was, I found that the ground tab inside the socket was broken. In my case, I had enough tab to pull it up and rebend it and it hs worked fine. If the sho did not replace the socket with the other things they replaced, I would start there replace the socket for the TS and side marker buld. Cheap, easy fix!
Good luck!
Greg