alt light on
 

Good afternoon all. I have a 84 944. I just replaced the altenator as the battery was dying and wasnt getting a charge. It worked for a bit then died once all lights were on. A few days later I tried it and all seemed fine then the alt light came on again. Can anyone tell me if this has an externat regulator or is it built into the altenator. If its external where is it loacted?