How to tell if alternator on 2002 Pontiac Grand prix isn't working.

Hello, If the battery is new and the vehicle still does not have power, you may have gotten a bad battery, or it may be installed improperly. If it has good voltage and is installed correctly, the first thing I would check is the fuses under the hood, and the ignition switch. If you don;t have the ability to chase this one down, see the link below for a list of certified shops in your area. http://repairpal.com/pontiac-within-10-miles-of-minneapolis-minnesota-55404