I have a switch, and an inline fuse at the back, no button on it. The switch, when turned off turns off the graphs so thats not the issue. The inline fuse is also good. there is one other wire coming off the cranking bat but I cant seem to find a fuse for it. Purchased new 5/4/15Bass Cat Sabre Vision EliteMercury Pro XS 150MotorGuide 75lb Tour EditionHumminbird – Stock (will be changing soon I hope)