Congrats on fixing your problem.
My approach to finding electrical shorts is the same approach you took - through process of elimination.
Your recent experience reminds me of an electrical short I had in my 79 Toronado many years ago. The cause of the short was a penny that my young son had dropped into the cigarette lighter. Back then it was common for a car to have a cigarette lighter in each passengers armrest.
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles