hi guys i have a pioneer head unit he one with all the colour changin, when i turn the ignition off the head unit looses its place on the cd and gos back to track 1 again, is there anyway to wire it up so it remembers the place, when the key is on the ignition it remembers the place when i turn it on and off, if i conected the head unit to a constant live power feed would the inbuilt amp not drain my battery, as i found with my old sony.