Look at the charging light in the dash is it on all the time ,and never going out when the engine is running ? is it working even with key in the start position without starting the engine ?.Or is it that you have no red or orange light at all showing . No light your bulb-- is shot . On all the time , regulator needs changing in the alternator this job is easy to do . If bulb never shows then the bulb in the console will need replacing .Alternator wont charge if bulb is shot,, the bulb joins the circuit up .