I had front and back turn signal bulbs that blew out, at this same time the radio wasn't working as it should, fading in and out. Replaced both bulbs and no more radio problem. What's up with that

 

I've heard where a light bulb can fail by partially shorting out instead of failing outright. I guess it's very rare. But if it did short, it might cause the symptom with your radio. Sometimes electrical stuff can very weird and frustrating. The good thing is it sounds like you resolved the issue.

 

Sounds like a weird issue, never heard of that before.

 

Like was mentioned, it sounds like the bulb was shorting out. Had that issue with a honda.

 

I've had that issue with home light bulbs.