Have you gotten the cruise recall done yet?
Look for a damaged or miswired trailer connector near the rear bumper, corrosion inside the taillight bulb holders, & any aftermarket wiring like alarm/RKE. If you still can't find it, install a small 12V incandescent bulb in place of the fuse - it should light if the fault is still present. Then start unplugging things while observing the bulb: RABS module forward of the glove box, hazard flasher on the BACK of the dash fuse block, brake switch on the pedal arm, & cruise switch on the master cylinder. When the light goes out, you just unplugged the short. If it doesn't, the short is in the wiring harness.