If you're hooked up directly from the campground connection to the TV, then either there is no signal at the campground pedestal, the coax cable is bad or your TV is not set up correctly (or is bad). It's not the trailer since you've completely eliminated it. Do you have a replacement cable? and/or a second TV?
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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