radio issue
 

Hi

Need help, 2005 Grand Marquis, Radio shuts off when i close or open the driver door the wire harness can be moved on the door back and forth and sometime i can get to stay on, I would like to bypass the door and wire the radio directly to the fuse box or battery by pulling the radio out and finding the hot wire then running a separate to a new power source can that be done ?? Can anyone tell me which one is the hot wire to do this just getting tried of not having any tunes while driving any help PLEASE