To diagnose a starting problem here are a few things Ive picked up from working in an auto shop.
If you hear a fast loud clicking but no starter noise (sounds loud like the engine) usually means dead battery or a locked up starter. If using jumper cables it would probably mean starter. A little tap on the actuall starter can sometimes free it up (however this usually happens during the summer in my experience tho)
If just a few softer clicks can mean the solenoid isnt doing its job. Taking a metal object across the terminals would comlete the circuit without the solenoid and will immediately try and turn the starter. No spark would mean no juice (battery) and a spark but no starter turn over would mean bad starter.
If when you turn the key over to start you hear nothing its usually a bad connection or dead battery (this would take running the battery dead like turning on the lights or trying to many times)
If it happens to be battery, your alternator or battery could be the reason. To test if the alternator is your problem, with engine running you can pull the Positive cable off the battery and if the car does NOT die your alternator is usually fine.
Please try these with caution they can be dangerous. Autozone, or any parts store, should have a machine that will also check these things if you can get the van there somehow.
Edit*Well glad you got it fixed. I know this is a little late lol. Guess next time I should read all the posts before sending a reply :P
Last edited by Cmudr1; 12-03-2010 at 04:40 PM.
Reason: Edit* Shouldve read all the posts lol