For sure.Some circuit tracers can work by connecting to any hot wire in a pull, and a convenient ground. You should then be able to locate the overcurrent device feeding it.
I was just wanting to make sure I'm on tbe right track thinking it's line voltage.
I know from working on old residential low voltage switching, tbose relay panels can be anywhere. And in this building there are a ton of corridors, crawl spaces, attics, and other places designed for access to various plumbing connections, etc.