Hoping the greater POG nation can help this newbie with an alternator light issue. From what I can tell the belts are good and battery voltages seem normal. But while driving yesterday the small red alternator light on the dash would come on for a minute or two and then go back out (the coach is an 08 Marathon XL). It continuously cycled on/off for a couple of hours.

If anyone has seen this before I'd be grateful for some insight.

Many thanks in advance,
Mark