is it possible to rewire something or other so that the radio stays on when the key is taken out of the ignition and turns off once the doors are opened? I know of other ford and gm vehicles that have this, and i was wonderin if i could do this to my truck. it would be extremely handy and much more convenient

 

Goto to this address http://www.fordf150.net/howto/radiorelay.php
gives schematics and basic howto