Right, finally got around to doing a better job with the adaptor. I've spent hours messing and still can't get a consistent decent signal on the radio. Fiddling with the wires on the head unit seems to give variable results which doesn't seem right at all.

I attached the empeg and (blue wires not connected) got more interference with the radio. So, I connected the empeg radio module and this improved things. Funny, only needs the wire extender connected and not the actual module. All seemed to go well until I put it all in the dash. As soon as the empeg is in place I get reduced radio quality. Aarrrggghhhh!

Oh, and along the way I found the fuse had blown in the yellow wire holder so that explains why no glowing led.

So, what to do, what to do? I'm a bit stumped now.