The lights run off of 12V DC and use your RV's batteries to run when not plugged in. When plugged in it uses the AC and converts it to DC and runs the lights.
Please check your battery disconnect switch. It's most likely off. In my Winne there is a battery disconnect switch which disconnects the two batteries near the door. Lights wont work when unplugged and the switch is off. Lights works when plugged in or unplugged and switched on.
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