When my trolling motor died and I was troubleshooting why, I tested the plug with a multimeter and it read 34.5v's. This is strange because I only have a 24v system. My first thought was the previous owner may have tied in the cranking battery. I completely unhooked the cranking battery and for some weird reason other then today is a solar eclipse I still was reading almost 36v at my TM plug. How is this possible? I admit I am not great on this subject so I asked to make sure I was using the multimeter right and I was. And no there isn't a 3rd battery I'm unaware of or it's invisible So any help would be greatly appreciated.