The van will not start. I've got battery juice (radio goes on, wipers go on, etc.).

Sounds like it could be the starter. But first check all you hoses. A leaky vacuum hose can cause problems. Let me know if this helps.

Just because the radio etc works does'nt mean that the battery has enough power to turn the engine over ,so try a jump start then get the battery checked to make sure its holding charge. if thats ok get the alternator charge rate checked, as if on the low side the battery will not retain enough power for all the vehicle's components.keep me posted