2008 rear marker lights out

[user655321]

Hi everyone
I have a 2008 Yaris and just in the last few days the rear marker lights stopped working. The break lights work, Hazards work, turn signals work, reverse lights work, plate light works. All but the plain ole marker lights work. Is there possibly a bad ground or fuse. I went to all my fuses and they don't seem to be blown. I even continuity tested the 10amp fuse that is supposed to be to the tail lights under my dash to see if that was the problem, but the fuse is fine. Any ideas??