Last summer we managed to blow an engine on our 1995 325 Aft Cabin. One of the things the mechanic noted when he was done was that he had switched the battery switch to off and still got shocked. With electrical not being my forte, I called in another mechanic a couple weeks ago, who decided that the (two battery) switch had just worn out, and stuck on. He walked me through how to replace it, and I decided it was simple enough. Got the new one, transferred the wiring one at a time, making sure the all went on the same poles. Switched it to off, and all the DC stuff still stayed on, including being able to crank the engines.

I plan on going back down with a multimeter to do a bit more scientific testing, but any thoughts on what the issue might be? It’s not exactly a complicated system. Besides the battery cables themselves, each battery pole has a voltmeter wire attached, and that’s it (bilge pumps attach at the batteries). Neither the mechanic nor I can see any odd bypassing going on. My only thought is that maybe someone mixed up the cables at some point and swapped one of the battery cables with the output. I just don’t know how that would still make “off” not work.