How do I change a turn signal light?

Is this the one below the bumper, or the one like a cornering light bulb? Either way, you should be able to access the bulb holder from behind, unscrew the socket and replace the bulb, then reverse the operation and you'll be good to go.

Thanks. This is the one below the bumper and I spent 1/2 an hour trying to figure out how to access it. I can access the main head light, but I couldn't seem to get to the blinker underneath. Any other clues?