finally saw what was causing it" makes for a good story, but two years is a long time to reach that point. Chafing shows up fast, like fuzz on the loom tape or a shiny spot on the insulation, and a quick look every few months would've caught it way earlier. A full teardown after 24 months is fine if the harness was buried behind a bunch of stuff, but for a normal run that just sounds like nobody was checking.