In the long list of an RV updates/repairs I've been too lazy (or busy) to write, I recently had to replace mine. Opposite problem however... I was getting 18v to the battery.
However... many years back I had a similar problem, and replacing the voltage regulator was the solution. Driving home one evening and my head lights just kept getting dimmer and dimmer. With the engine running, you should get around 14.5v to the battery. Anything above that or below 12.5 warrants replacement of the voltage regulator.
Short update with details to follow eventually...
gauges working
speedometer working
overheating 'should' be a thing of the past now
90% repaired exhaust... (still needs a new manifold gasket)
repaired valve cover gasket/leak
running much better overall. Which is good because we're going to do our best to get the RV to Florida and back over Christmas. 1300 miles ones way. Should be another adventure!
