OK, so the in laws bought a 2006 TT and the invertor has issues. It will not charge the battery or run the 12VDC lights, even when on shore power. If you hook up a battery charger to the battery all...
You can test the converter by disconnecting the negative battery cable, plugging into 120 volt shore power then measuring voltage across positive and negative leads at the converter. No voltage means bad converter. Good luck / skip
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