Sounds like your battery disconnect is off. 1st thing you need is a voltmeter. Lights are 12 volts. A/C is 120 volts. You need to verify that your battery disconnect is ON. A/C uses both 120 and 12 volts. Propane has nothing to do with your problem.
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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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