need to know the wiring diagram for alternator on my 2000 dodge viper rt/10

Since you have replaced your generator, Intermittent charging can be a defective Powertrain Control Module (PCM). This controls the field circuit and regulates the charging system. The only other suggestion is to closly examine the electrical connectors from the generator to the PCM. Look for loose connectors, chafed wires etc. For wiring information you can go to Mitchell Auto Repair Manuals online.