the link shows a good explanation. make sure youve removed the three screws (green arrows) and then the blue tabs should be able to be popped with a flathead while pushing the entire housing from under bumper and delivering it outside. The fog and the turn light housing are tethered together and...
Just had to remove the housing for a water filled turned signal. So hope you figured it out but if not there are 2 tabs on top of the housing frame that are black. Push those in and then using a flathead pry apart the grey housing that contains the lights from the black frame and it should pop...