After ten years and 130,000 miles the battery in my truck finally won't hold a charge. Replaced the battery and now my Kenwood stereo is in "security code" mode. When I did the install I never entered a code, all I did was basically plug it in and it has worked great for the past 5 years. Does anyone have any idea how to get out of this mode? My research has turned upped codes like 3051 and KCAR. They don't work.