Voltage Drop - NOT Park Problem

wnjj wrote:
I think this was mentioned earlier but you need to put a decent load in the RV then measure the voltage at every possible place you can between the source and load. You’ve said the voltage is good at the pedestal and bad at the load. This means there is a resistive connection somewhere. While under load, measure the output side of the breaker the load is connected to in the RV panel. Then measure another one to eliminate the breaker and wiring to the load. Next move upstream to the feeder line, transfer switch, etc.

The problem will be between the last “good” voltage and first “bad” one.

Yes keep poking around until most of the voltage drop is found. Should not take more than a few minutes once there is access. Tightening a connector is not proof that it is functioning... need to measure.

Hard to tell what the error codes are saying without the owner's manual.