When you say out, do you mean they dont light at all, or they light but dont flash?
There are 2 fuses in the I/P fuse panel that supply power. A 10amp and a 15amp fuse. That power goes thru the Electronic Flasher, and then to the Multi-function switch, then to the lights. If the fuses are good, and the electronic flasher is good, then I would suspect the switch or a wiring break as the problem.