The biggest problem with the sliding doors on these vans was the junctions switches between the door and the door jamb. These are the retangular boxes on both the door and the door jamb that come together. They are black in color. If you look closely at these little metal switches on the door that doesn't work, I bet you will find that a few of them might be black from arcing. I would strongly recommend cleaning these contacts. You can use nail polish remover or a pencil eraser. I also use a very fine piece of sandpaper and clean the contacts both on the door and the door jamb. Clean both doors and then you can reset the door by pulling the fuse #13 (7.5amp) fuse in the pass side fuse box and leaving it out for a few minutes. Its the one that is labeled backup/clock and that will reset the doors.