There are Three places to check. One is an inline 12 volt fuse/breaker within 6' of the batteries. The other is two 34/40 amp reverse polarity fuses on the converter. The third is the 15 amp 120 volt breaker in the main breaker panel. Turn it off. DISCONNECT the 12 volt out put leads of the converter. Turn on the 15 amp breaker. Check the input voltage at the converter. 120 volts AC. Check the output voltage of the converter. 12 volts DC.
Check the battery voltage at the battery leads you disconnected.
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2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
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