It could be a bad alternator or it could be a badly failed battery that soaks up all the alternator current. One way to tell is to use the converter to try charging the batteries and if they come up to voltage then it's very likely the alternator. If they don't come up to voltage then the batteries are gone and this can be confirmed with a battery tester.
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Jon and Alie Kabbe
Started with 77 Coach
Now have 39' 93 coach
2007 civic toad
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