Here are the turn signal wiring diagrams so you can see that the BCM handles the lighting distribution for the car which might be bad. Can I ask if any of the turn signals are working or lighting up at all? Please test the fuse with the ignition system on. Check out the images (below). Let us know what you find.
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.