We have a 2015 Coleman CTS262bh and we had the same problem could not watch satellite using the existing connections, i.e. 2 connections outside and one for second set in Bedroom and of course the main power amp face plate in the entertainment centre. The book and the RV dealership says if you want to watch cable/satellite you need to turn the Amplifier off but this does not work due to the fact that the dish sees the face plate as a splitter and no signal gets through so here is the fix for you if you have the same problem without loosing the power amp for the radio.
First remove the fuse for the radio which is also for the power amp.
remove the face plate from the cabinet you will see 3 coaxial cables and 2 power cables. pic.
This is the book schematic that show the rear of the face plate remove the coaxial marked cable. now drill a hole the same size as a cable connector ( see next pic)
below where the original connector comes through face.
plate. and put the cable connector through this hole and lock it off with the lock nut. Now connect the coaxial you removed from the back to this new connector. replace face plate and connect receiver box replace the fuse and power up your amp so you can still use radio. see next pic of how the end result should looks.
you can also connect the out from receiver to the original faceplate outlet and this will still run satellite to the master bedroom outlet.
hope this helps