Rear Center Brake Light Out

I'm not really a mechanical person, but replacing a rear center brake light doesn't seem too challenging (I'm assuming the light bulb just needs to be replaced.) I consulted the 2009 TM 2619 Owner's Manual, but didn't find anything on this topic. Any suggestions on how to replace the bulb. I'd rather not have to take it back to the dealer to fix if it's a simple fix. Help!