I hope someone can give me insight on how o replace that pesky bulb in the side mirror marker lamp? I know there are two bulbs in the lamp assembly (one for parking light and the other for turning). I have diagrams, but none discuss how to change the bulb. Ohhh.. 2010 F-250 Powerstroke~

 

If you turn the mirror all the way out there is a small clip inside that will release the lens from the mirror housing. Pull the clip and then you can remove the marker light and change the bulb.

 

What that guys said! Its really simple.

 

So it is! Thank you! Parts house guys freaked out trying to help, lol! Bulb replaced!