I removed the outside patio light in my 2000 roadtrek 210 to add a LED light strip that would run the length of the awning. I also installed a dimmer on the inside. My wife loves it.
Since this was a project I have been thinking about for quite a while I thought others may benefit from my experience and a few pics. Notice I had already replaced the standard bulb with an LED version. I have done a lot of mods but every new one offers challenges and can be nerve wrecking. Hope this helps.
First step was to drill out the rivets. If you plan to reuse the light make sure
the drill bit is only as large as the rivet shaft.
Then I took a box cutter and thin chisel and slowly worked my way around the light. I would suggest doing this on a warm day when the goo may be a little softer. Go slow take your time the pot metal is brittle and it does not take much to break it.
Then I used a nylon string to "cut" the goo behind the light. You may want to rap the string around a couple pieces of broom handles to get more leverage. I did this after the photo and also used a sawing motion to cut it out.
Slowly and carefully remove the fixture. The wiring is not very long behind it so be carefully you leave enough slack to attach crimps.
If you intend to add an LED light strip like me, I had to measure where to drill the hole to run the wiring to make sure I did not drill the hole too high. Also be sure to mount the LED strip slightly below the hole. This way the pigtail will not allow rain to run down and possibly into the rv. Lastly I gooped it up with silicon and the pigtail hole and riveted it back in place.