When Generator is running I have power to all equipment. Stop Generator and plug in shore power cord and I have nothing. Shore cord power into coach comes in to small junction box at top of breaker box and says transfer switch and has power coming in from shore cord. There are also hot-black and ground-white wires coming in labeled generator and wire nut to coach wire, standard 12/3. Since I have power when running generator but no power when cord is plugged in is the transfer switch bad? All breakers have continuity but no power to them when cord is plugged in. I have searched and cannot find any additional breaker that need to be energized although it seems that something is keeping power away from breakers from shore power cord. This is a 30 amp system on a 89 Class A Granville. Can I disconnect the generator service wires (not run generator) that go to coach wiring and wire nut to shore cord to get power to breaker box. Any help appreciated.