ALT gauge issues- clicks and pulses 69 DART. NEED HELP!!!

Heres a video with it running... as you can hear-its idling fine. You can hear the click and see pulse at about the 4 or 5 second mark:

https://cvws.icloud-content.com/B/A...5D97&p=21&s=yWl8sqKmekFtcQz1lh220JBtx_g&teh=1