If the battery is dead you will need a battery charger.
If the battery is good and you have low amperage then you will need another alternator. Most parts stores will check it for you.
If you are looking for MORE amperage then you would have to buy a larger amperage alternator.
The 2002 Dodge Grand-Caravan has a V6 engine.
The 2002 Dodge Grand-Caravan has 12 valves.
The 2002 Dodge Grand-Caravan is 6 ft. 6.6 in. (78.6 in.)12V front and 12V rear power outlet(s) wide.
The 2002 Dodge Grand-Caravan has overhead valves (OHV).
The 2002 Dodge Grand-Caravan has a 4-speed automatic.
The 2002 Dodge Grand-Caravan's turning circle is 39.4 ft..
The height of the 2002 Dodge Grand-Caravan is 5 ft. 8.9 in. (68.9 in.).
The 2002 Dodge Grand-Caravan is 16 ft. 8.5 in. (200.5 in.) long.
The curb weight of the 2002 Dodge Grand-Caravan is 4011 lbs..
The 2002 Dodge Grand-Caravan has a drag coefficient of .35 Cd.
The 2002 Dodge Grand-Caravan has 39.6 in. of front head room.
The 2002 Dodge Grand-Caravan has 57.2 in. of front hip room.