Tiffin diesel mysteries..............
2015 Tiffin Red diesel with Cummins engine and Allison tranny. All going well until I took in for 15k service at Freightliner. I had seen a dash Low Battery warning once upon starting. Diagnosed ...
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You need to look to see what is connected to the batteries BEFORE the shut off switch. You could have an issue with your solar power controller. Disconnect anything connected before the switch and see if you can eliminate your battery issue.
