It was mentioned earlier in this thread but are you closing doors and allowing time for everthing to go to sleep? I traced my drain to the instrument cluster 2 years ago useing the same procedure of removing fuses. I jerry rigged a switch and relay rather than change insturment cluster. As I recall,you can trip the door latch and leave the door open and the system thinks it's closed. Pretty handy while removing fuses beneath steering colum. A wiring diagram would be handy but I was never able to find one. The only unfused circuit(s) that come to mind is aux,#4 and #2 in 7 way trailer plug.