97 expo power window

I have a 97 xlt fully loaded. Have been noticing once and a while the battery drained enough not to start. Have been attributing it to my son not turning off the dvd player in the back. I was wrong. Went out this evening to pick up company van, and the truck was dead. When i reached in to unlock the door, i accidently pushed on the power window switch and the window rolled out....key was not in the ignition. It quit when I opened the door. Any ideas?

I think there is an ACC relay associated with the windows, but not sure for that year. It can go bad and leave the circuit open when it should have closed after turning off the key. Does that year have the timer also that always you to open/close windows for a minute after turning off key and before opening doors? It could be that timer or the door switch, or combination of both.