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Hi my name is Robert.....
IF you have AC voltage going into the transfer switch and nothing coming out then the transfer switch failed and would need to be replaced. They can fail on the generator side or the shore power side. Once the relay starts to stick then it needs to be replaced and you normally replace the entire TS..... IF you have more questions or concerns please feel free to contact me... Robert
That is very possible on the breakers or something like a bad voltage regulator inside the gen. I might go try and take a reading in and out of the breaker at the gen, if it is much higher or normal on one side then it is the problem. Also make sure there is nor a junction box between the TS and the generator, sometimes they will use them and the connections will have wire nuts...... I can try and pull a print if you like but need the model and model number of the Winnebago... Robert
Was just checking in to see if my answer helped??? IF you have more questions or concerns please feel free to contact me... Robert