Classic/Antique Car Repair: gen light, generator light, camaro

Question
i have a 1978 camaro and my gen light come on usually when i sitting at a light or at a stop and when its in gear and once i start to go and it gets high enough in the rpm's it goes away or sometime it will just come on when im cruzing down the street and ill give it gas or just rev it and it will go away, what could cause this and how do i fix it from coming back on

Answer
Hi Stephen:
Could be several things. Check them in this order.

Loose generator belt. Check the belt to make sure it is really tight and is not slipping. If the belt looks really slick and shinny, it worn and needs replacing.

Bad battery. Have the battery tested. If you have a weak cell, that could cause the generator light to come on.