Installed per instruction but when I go to start motor after initial start-up unit either starts back up looking for sat. or just goes black any ideas do I need to run primary power wires to battery instead of off switch like previous fish finder ? Also seems like unit just flashes alot does show structure and all just fine but kind of acts like a cp rebooting itself. And if I leave unit on for along time while fishing with the trolling motor after awhile it just shuts off is this a feature to not run battery down?