Winegard has a very good tutorial about this on their website, but, in short, you need to isolate the cable connector from the amplifier. If you have a "cable/antenna" switch somewhere, switch it to cable.
You need a hard-wired connection between the sat antenna and the receiver to get signal. The LNB on the dish needs power from the receiver.
2005 Georgetown 342DS XL, Full Banks Package
2005 Liberty Renegade 4X Toad
1989 Wrangler Sahara Toad
1984 19.5' Beachcraft i/o 5.o liter, 4-bbl (and you thought your Moho sucked gas!)
D/W Carole and Maggie the Teacup Lab (Black Chihuahua)