Originally Posted by
b00gers
Kinda a PITA...but hardwire it to the battery. Just run a small cable from the deck's yellow to the positive on the battery. See if it retains information when you shut the car off.
Also, is the fuse on the wire blown?
no need to run a wire off the battery... BAD IDEA, too buch resistance and amperage will be going through that wire and will cause a fire or melt down sooner or later... tap off a constant that is already in the car the closest one to the head unit will be on the radio harness a white wire with a yellow stripe(radio 12 v constant), but if that is whats not working then you can use the WHITE wire in the ignition harness which is also 12 Volts constant but no matter what you do u must run an inline fuse