Easiest way I have found to remove the front marker lights on the fender flare, without removing the headlight, is to pop the lower porting of the fender flare out from the body.
Remove the (2) black screws, 7 or 8 mm bolt head, then using a plastic panel popper pop off the front portion of the fender flare. This will give you access to the light and the connector. You will also have to pop a retainer clip out for the light wire loom as well.
With that said if you have to remove the headlights for any reason then that is by far the easiest way to replace the marker light as you have full access to damn near everything.
Either way will take maybe 20 min per side first time doing it. I don't have any pics unfortunately, but hope this helps.