My fog lights have not worked for 2 years now.

Hello, I'd share that the most common cause of fog lights not working is indeed bulb failure. Usually this is due to the lamps themselves being fractured -- the lenses cracked or broken. Water and bulbs don't mix well, damp or wet. Check bulbs first. Check for power and ground at the sockets if the bulbs are found to be intact. If no power and ground at the socket with the switch on, then trace the circuit backwards until you find the source of the concern. Note that you'll need a wiring diagram if you want the best resources to find out what's going on. Don't think about "power modules" until you do the leg work of checking the wiring all the way along the way. Again, a DVOM and wiring diagram is essential. Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops

I have a 2013 optima and my fogs lights weren’t working either. I replaced the turn signal switch and problem solved. The reason I replaced the entire switch is because when I played around and flickered the fog light switch rapidly, sometimes it came on. Replaced it, problem solved. And its a fairly easy DIY task! Hope that helps.