While driving van , it died at stop light, and would crank but not start. Had van towed

Hello, you did not list it, but your van is clearly equipped with the 6.0L Power Stroke Diesel engine, since you indicated "2 new batteries". This engine has more possible causes of a stall and no start than I could possibly try to suggest. Additionally, you need a 6.0L Power Stroke Diesel experienced and trained technician to inspect and repair this vehicle. There are so many little ins and outs that an experienced tech will understand and know where to look for concerns and data using the diagnostic tool for the vehicle.