[RMcNeal]

There should be a standard 110 v plug in the inverter. Follow this wire to the auto transfer switch. Mine is mounted a few inches away on the ceiling of the basement near the inverter. With no shore power hooked up, unplug this plug and your fridge should have not power source, light will not light. If leaving shore power unhooked and plugging this plug back in restores the power to the fridge and the light comes on, then the inverter is supplying some power.