My comment is
but just a note to the diesel owners out there when you find out you have lost an alternator or have a charging problem with your system:
Don't turn off the engine! You might not get it started again. As Mike -N- Sally found out, you can continue your trip with low voltage. Diesel's don't need 12V to run the engine. All the accessory items do need 12V (lights, fan for a/c, radio, etc.) so you can conserve 12V by shutting down all unnecessary electrical items and drive your coach to a repair destination.
Had it happen to me once. I actually drove to my campground with a bad alternator, bought a battery charger from Wally World, charged the engine battery over the weekend and then drove 100 miles home 2 days later conserving 12V along the way..... then had the coach fixed.
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Don
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX