[MRacer Girl]

my friend just installed a new deck in my car but for some reason there isn't constant power going to the stereo unit, which causes the deck to lose memory everytime i turn off the car off, unlike the clock and date on the computer and ac/heater. This causes me to reset all the presets over and over again. Is there a fuse or something thats responsible for keeping the constant or what? pls help if you can! thanks!