I know this is an old thread...but...
Have you checked your fuses? There's one that controls the alternator. If it wasn't the middle of the nite, I'd go out & verify which one, but I'm pretty sure it's labelled "ign". I blew that fuse in mine and experienced EXACTLY the same simptoms. It made me nuts trying to figure out why the battery wasn't charging. Felt like an idiot when my wife double checked the fuses & found that one dead. (3 days without my van...)