Last week I had some battery problems with the #1 battery on my 273 Chase. I observed the ground connection was very corroded and proceeded to remove the three black leads, brushed it clean and replaced them and all seemed well. Today I used the boat for the first time and could not get the power console which holds my Simrad plotter to rise. After some fiddling I discovered that down is now up and vice versa. Any ideas how to resolve this? :?: