I'm back! I was sidetracked with a weird starter-not-cranking problem. Read about it in the Class A Motorhome forum. I got help from Tom/Barb.
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New chassis batteries are installed, checking close to 13 volts. I managed to attach clip leads to the alternator output terminal/post (+) and to the Remote Sense terminal/post. With everything off, alternator(+) lead indicates 12.76 V, and remote sense lead indicates 12.77 v.
With engine running at idle, dash voltmeter indicates 14.9 to 15.3 volts. Alternator (+) lead indicates 15.9 to 16.5 volts. Remote sense lead indicates 16.6 volts. I shut down the engine (the voltage wasn't decreasing).
Other than a few years ago, removing the alternator, removing the voltage regulator and replacing the brushes I simply don't have enough experience with symptoms vs remedy. Off the top of my head I tend to lean towards replacing the voltage regulator. But, I will wait to hear from MexicoWanderer and otheres. Thanks
