Courtesy Circuit Blowing

Turned car on and attempted to change radio station. Power antenna stopped going up and crackling sound from radio, couldn't change station, adjust volume, etc. Turned car off and then back on and radio display totally disappeared. Thought was radio problem. Investigation reveals blown courtesy fuse, no power to courtesy lights, power door locks, radio (including time display), part of instrument panel is dark when turning on lights. Radio circuit breaker has not blown. Any suggestions or anyone having similar issues?

The main power souce for this circuit is a fusable link running off of your starter, I'm not sure which color though. If you have a test light, with the key on and the engine off, test for 12V after each fused link. Also while checking check for obvious cracks or melted fused links.