The radio should go off on it's own after a few minutes or when the passenger door is opened.
You Can Start By Cheeking Your Fuse. The Fuse Box Is On The Side Of The Dash After You Open Drivers Door.
no different body style
One of the temp blend door actuators has failed.
The fuel door release on your 1997 Ford Astro van is located beside the drivers seat. The lever is on the floor.
there are two under the back seat....and one on the drivers door dash side...
Carefully
I have a 05 Envoy XL Denali, and yes the radio will shut off when you open the door after the key is removed
in the trunk on the drivers side near where the fuel fill door is at you`ll see a plastic tag hanging there just pull on it and the lid will open.
Open the drivers door and look in at the door jam or side of door and you will see a sticker that will tell you.
Probably the body computer is not shutting down. Ck drivers door switch for problem. Radio should shut off when any door is opened with key off.
Listed on the drivers door post and in the owners manual.
Probly under the drivers door on the inside of the frame.