You will need to run all your new cables thru the basement. Fishing the HDMI down thru the bedroom wall to the basement and back up again at the front of the coach can be challenging but you can do it. You probably need to drill a large (1") hole to accommodate the large HDMI plug. Order a 50' HDMI cable(it's a long run), eBay is a good source. At the same time I would pull a coax from the rear TV to the basement TV, a second coax from the rear TV forward to the SWM output, and(if none exists) a third coax from the basement TV up to the switching box. Coax is cheap and it's a lot easier to pull the coax now in case you need it later. This way you will have a couple of options at a later date to use 1 or 2 or even 3 separate receivers, and all of your DirecTV signals will be running thru new, separate wiring. All of your cable/batwing/DVD signals continue to run thru the old Winegard(?) switching box, and you will control signal input at each TV choosing from 1)DirecTV signal or 2)the switching box(cable/batwing/DVD). All your existing coax cable was run thru the ceiling. I would definitely NOT run your DirecTV signal thru the old Winegard(?) switching box... you would just be asking for trouble in DirecTV-Land. There is a coax running from the back of your switching box to the rear TV... but I would continue to use that one with your switching box to carry the signal to the rear TV from your cable/batwing/DVD outputs. If you need to run wiring into/out of a slide, follow along existing wiring and observe how much slack you need when the slide moves... bundle the new wiring with the old. I wired and used this arrangement in my Itasca Horizon for two years and wouldn't have changed it at all, mine was pre-SWM and I used individual HD receivers at each TV. Good luck, you will learn a lot about your coach as you pull the wiring!
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Kent & Sue & Pecos
2010 Allegro Bus 43QRP
Formerly 2004 Itasca Horizon 40AD
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