Okay, thanks.
Okay, thanks. I removed the cover for the outlet outside since I figured it was most likely to be the culprit since outside. Both screws that hold the cover on ended up breaking due to corrosion. That's pretty awesome because it commits me to replacing the workbox since that's what the screws broke off in. I went ahead and removed the outlet from the wiring. With the outlet removed, I was able to determine the order of the circuit because at that point I still had one good circuit and 3 that weren't working. I went to the 1st outlet in the circuit which is in the garage, removed the cover, didn't see anything obvious. I pulled the outlet out so I could inspect the wiring. Two black and two white wires going into the back of the outlet in quick disconnect sockets with 12awg romex on 1984 house. Two of those wires had at least 1/4" of exposed copper where fit into back of outlet. Also noted the 4 screws on sides of outlet, two on either side, were not screwed in at all. Was hopeful problem was some of these hot exposed wires and screws being crammed back in workbox making contact with something it shouldn't or being too close. I pulled the outlet completely out of the workbox so none of these exposed wires or screws could be hitting anything or too close, but when I tested it, the breaker immediately tripped again. I removed the outlet from the wiring and put the LED load on the hot wire and neutral and tripped breaker again. I installed brand new outlet, tested and tripped again. Removed panel to breaker panel, saw 2 dead geckos under main breaker, looked like maybe touching or close to bus bars coming out of bottom of main breaker. Powered off main breaker, had my headlamp on, removed geckos, powered back on main breaker, tested, still tripped breaker. I'm pretty sure I've isolated it to the breaker itself or how it's wired. I noticed on this new breaker that I installed a year or so ago that there's one black wire and one white wire going into the side of the breaker, but there's also a socket on the breaker that's labeled load neutral that doesn't have a wire in it, so I'm wondering if I have the breaker installed correctly or not.