Iíve been reading a few threads about the fact that the fusion does not link with the TV audio, well I think I found my solution.
Iíve got an Apple TV plugged into the HDMI splitter and Iíve removed the Fusion Infotainment system and installed an Alpine iLX-F309. While a bit pricey, Iím very happy with the results.
It has an HDMI input like the fusion (so you could do the same with it), and Iíve routed an HDMI cable from the overhead HDMI splitter, down the plastic cover to the left of the driver shoulder, under the floor up through the console to the iLX-F309.
Now I can have the Apple TV(could be any HDMI source) play through the radio and audio comes out the roof speakers.