If its doing the same as your old one your very likely to have a wiring trouble, Is the battery/alt light on or does it come on before the engine is started? , or what is the voltage gauge reading engine not running Vs running.
The alternator, belts, and wiring.
no charging
2000 honda foreman 450s charging wiring diagram and charging system flow chart
You can get a wiring diagram for your Oldsmobile 455 cubic inch engine alternator at most auto-parts stores. Oldsmobile service manuals will have the engine alternator wiring diagram and can be obtained from most local libraries.
When working on anything electrical, a person should have a diagram. The diagram for the alternator wiring for a 1985 Volvo 240 can be found in its maintenance manual.
need wiring diagram alternator and regulator ford 1978 f150
yes
You can find the wiring diagram for the starting/charging circuit in a Haynes manual for this car. You can get one at any local parts store. You can also find wiring diagrams at www.the12volt.com
Battery
Is it charging, if not have you checked wiring to alternator.
Have the charging system checked. Possibly loose or corroded wiring, a loose alternator belt, or a bad alternator.
2006 Harley alternator regulator schematic wiring diagram for a 1996 harley softail