On a 1991 Aerostar van, how do I unstick the side door.

I can't really tell. I do hear the mechanism on the far end when I pull the door handle, but I can' see if it has moved anything.

That's a tough repair even for a seasoned mechanic.... It's hard to help out much over the internet! Check out YouTube, maybe can find a video on how to at least get it open.... Then you can check the front latch.... Good luck.