Edvic,
Thor buys a "stripped" E350 chassis and builds the coach on top of it. The wiper/washer switch on the stalk is Ford's, but the stripped chassis doesn't have a windshield, wipers, or washers so it isn't hooked up to anything.
Thor adds their own windshield and accessories including a separate switch. Why they don't just use the stock switch I don't know, but they don't. We all have the "dead" switch.
The TV behavior you describe is exactly what mine did when I left the antenna amp "ON" and tried to use the cable. It has to be "OFF".
I believe the cable itself runs from the fitting on the street-side wall, up to the vicinity of the antenna amp. Both the cable and amp inputs then go into a splitter that sends the output signal to each of your two (or three) TV's. The splitter might even be part of the amp. I haven't looked that close.
If it's a cable problem I would hope it's just loose at one end or the other. Finding a cut or break mid-run will be unpleasant!
Regards,
Randy
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