I have a 2004 Dodge Grand Caravan. My battery light keeps coming on, I have gotten a new battery and alternator, but it still won't stay running. I put it on the tester and it read: Definiton- Charging system low voltage condition. Explanation- Engine running and the ECM detected the charging system voltage was not within 1 volt of target value. Probable causes- Failed generator and open or shorted circuit condition.