Yeah so I got one of ebay which has the permanent live (yellow) and ground (black) wired into the iso connector but the switched live (red) is wired into the iso connector but not into the ford connector (see pic) so I guess they expect you to wire this yourself, also when looking at the sony>iso cable for my headunit there is a wire for switched illumination but that connection is not represented on the ford>iso lead.
Had an issue when installing today when the sleeve on the bullet connector on the ebay lead moved slightly and exposed part of the connector, I think this may have touched a ground as I lost voltage and haven't managed to locate the fuse for this feed out of the 3 fuse boxes scattered around the fan.
I have gone with a headunit with a builtin microphone with the option of plugging in an external one.
If anyone knows where the fuse is on these that would be great as the handbook fuse layouts don't seem to be the same as the actual fuse boxes in the van 