The answers you seek are on page 5-14 of your manual. Summarizing, replace the cable from the wall to the antenna input of your TV and press the button on the wall plate so that the LED on the plate is on.
Then on each TV, press the source button on the remote until it says antenna. Now, on each TV, go into the menu and find something like "broadcast" and set it for "antenna" or "off-air" or something similar but not "cable". If there is an option for "digital", select that. Then scan for signals. If you are close enough to some broadcast towers you should get results.
If you antenna can be pointed, point it toward the closest metropolitan area.
“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins