I Have A 2001 Dodge Grand Caravan 3.3 I Replaced The Alternator And The Battery Is Good. But Not Enough Charge Gets To The Battery. When I Turn Car On And Then Off, It Wont Turn On What May Be The Problem?

I suspect that you really do not know if the "new" alternator or the battery are really good. Lets figure for now that the battery cables are all ok.

These are easy to test, You will need a volt meter.

To check the alternator use the volt meter to check the voltage at the battery with the engine running. It should be more then 13.5 volts but no higher then 14.5.

To check the battery you will first have to have the battery fully charged. You must use a charger, driving the van around for a few days is not enough. After fully charging the battery let it sit for a couple of hours and then check its voltage. Should be at least 12.6 volts. If less then that and the battery is bad.