Both wires get 12 volts, but at different times so there should be no damaged components. What you may have done though is fed that 12 volts from one circuit to the other one, and the memory circuit is normally a relatively low-current circuit but it would try to feed the higher-current ignition circuit. Most likely all you did was blow the memory fuse. That is usually not listed as that because it taps off some other circuit that is always live. The typical circuits used are the interior lights, horn, or cigarette lighter, and most of the time that memory fuse will be inside the car. Regardless, check the fuses inside and under the hood.
Wednesday, January 2nd, 2013 AT 12:12 AM