Tony,
As I mentioned above, I've tried with 2 different modules and extension cables. So for the moment, I'm lowering those on my radar.
I did this install myself. I didn't cut anything off from the original install. I only connected the module via the extension and connected the antenna. I don't have a Sony Stalk.
I didn't do the original install, so something could be missing there, but from what I can tell, all looks good.
And I don't need to use the power antenna activator, so I left the blue wire unconnected.
Hugo, were there any other tell-tale signs of the problem you described in one of the units not responding to the tuner at all? I worry that somehow I may have a similar or exact same problem.
- john