I installed the Pioneer DEH-S31BT CD receiver into a 2006 Ford Focus SE. I used the proper harness, etc., and the radio operates fine except that it loses it's memory (Date, Time, Presets, EQ Settings, etc.) when I turn the ignition off. Originally, it had an in-dash 6 CD Changer in it. The car battery is fully charged. The only thing I can think of is that I used the ground on the harness instead of straight to the chassis of the car. Could the car ignition be cutting off the ground? I double checked the wire diagram from the harness manufacturer and from Pioneer. There is nothing listed for radio memory on the wiring harness diagram from Pioneer. I used every wire on the radio's harness to the car harness I purchased except the blue one for the power antenna/amplifier PW Switch. The old radio had an additional connector for the 6 CD changer that is unused. I figured the other small harness was just because it was a 6 CD changer and that maybe it needed additional power? The 6 CD changer is stock in the 2006 Ford Focus. It seems as though when the ignition is off, it is cutting all power to the radio.