If you have 12 volt power when connected to shore power, and your batteries were not connected, then your converter is working. If your converter was not working and there was also no power connection to your batteries, then you would have nothing. If your batteries were connected and your converter was not working, your batteries would discharge with use and would not be getting power to recharge.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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