Does anyone know how to change them out? I know how to get to the bolts but do I have to take off the door panel to unplug the wiring? Is there any place to go that show a diagram on replacements?

Yep, the panel has to come off. Look closely, some of them had a small top trim that comes off. After all the screws are removed, the panel will lift upwaard to disengage the locking tabs.