I have a 2004 grand caravan se. The battery went dead trieb to jump start but no go. Put in a new battery and now the radio doesn't work the door locks only work with the door closed and the odometer doesn't come on when I open the door now only when I turn it on please help I'm going nuts trying to fix this huge mistake we bought

Did you buy the proper battery for your car?

Was there a lot of corrosion on the battery terminals? Caravans have a large wiring harness that runs under the battery tray and if any corrosion got into the harness from the battery it can cause all sorts of weird electrical problems.