looks like same fuse fees power to both left and right sides, so unlikely its fuse.
Swap the entire tail light assembly and see if fault goes with tail lights.
else its possible its the body intergrated unit module (BIU), some of these aftermarket led light draw more current than stock and it can damage the BIU as per posts below
see here for repair few post down
http://www.ft86club.com/forums/showthread.php?t=59084