Would bet it is a splitter in the line some where. Ours will not work at all using the outside cable connection point in the power bay. In ours, the cable goes from the power bay to the back of the antenna amp. I've seen a thread on how to bypass it so you might want to search the FR fourm. It looked simple to do, just haven't done it yet.
2011: 54 days, 2012: 218 days, 2013: 175 days, 2014: 196 days
2015: 188 days, 2016: 72 days,
2009 Berkshire, 390QS, and toad