I have a 72 Chevelle, that when it is running, whether it is sitting still or driving down the road, the generator light will blink on and off and I can hear a slight clicking noise under the hood. I replaced the voltage regulator, but that didn't work. Checked the alternator wires, everything is working, and the alternator is charging. The light ( generator) will get bright, then it will dim down a little. Checked the belts also to see if they were loose, nothing. What could the problem be? Any help would be appreciated.