Never use the clean cycle on your ranges people always have problems afterwards because it's gets too hot and damages things. Check the voltage where the lights go into see if you have 120v. If you don't check the door switches for continuity. If the switches check out ok examine your wiring from where the light sockets and follow that path look for burns/cracks/damaged wire or connections. You gave no model number so i can't advise on you can break down the oven. More then likely just remove the back panel pieces and start tracking the wiring from both lighting circuits. Good luck