Came out to diagnos circuit for rv found that rv has proper voltage from breaker to outside plug. From outside plug to rv has proper voltage. Issue is internal of rv which is further than we can go as we did not wire rv or anything in rv.. they will have to reach to whom they bought rv and have them fix the internal issue. Outlets all have 120 volts in rv tv works. The lights are not working or the fridge or microwave. Lighten up electric is released of any liability to rv as our parts are working properly.