Red light on display on 2007 350 RINKER says reversed Polarity ?
Recently moved my 350 to different Marina for stereo work on there I had brought my 30 amp yellow cable to plug in boat on the Port side same side its always been plugged in to . For its whole life only one owner prior and he used port the whole time he owned it. When I left it was ok charging the stero guy get there and red light shows on display? He swaps the court to starboard side charges fine green light on. By switching the sides with same cable rules out the feed from the box. The cord so where should I start to see why the red light is on ? Is it possible it was ok and when he was in behind the panel something was connected wrong? He doesn’t recall but hasn’t ruled it out. the boats two hrs away so searching forums someone might have run across this after stero install? Or has had the main control board apart and has seen something that could have been switched or plugged in backwards.