This post from the above thread is most telling:
Keystone TV process broken
Just heard from Camping World today that they and Keystone agree all new Cougars and Montanas share an issue: their wiring is not interoperable with sat, cable, and OTA due to their wiring process using DIPLEXERS and single coax cables. Everyone agrees with new wiring harness, external antennae can’t power the You should all read how diplexers, triplexers, combiners, and splitters work/don’t work. Keystone isn’t standing behind their product, but Camping World in Strafford, MO is going to run new coaxes from my convenience center in to the living room and bedroom TVs. Hopefully will fix the issue by having a direct line from convenience center coax in, to TV out in both entertainment centers. Good luck.
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