Q: Radio light goes out with the light switch turned on.

Hello and thank you for contacting YourMechanic. If the radio is a stock radio and not an aftermarket radio, then the lights should be tied into the dimmer switch. Turn the dimmer switch to adjust the lights and see if the radio lights come on. Check the wires on the back of the radio for any looseness or any wires going to ground in the dash. It is common for the wires to wear in to the dash or get loose with stock radio’s in Toyota vehicles. Sometimes, the radio mounting hardware becomes loose causing a ground issue and making the lights flicker, but keeps the radio functional. If you need assistance with your radio lights, then seek out a professional, preferably a professional from YourMechanic to help you with your vehicle.