Spent the day in the garage, took JVC DAB head unit out of our Mini Cooper as it is not used that much, plus has hands free iPhone for iPhone. Took Alpine unit out of Morgan and fitted into Mini and worked first time.

Fitted JVC unit running mic, and fixing seperate DAB unit behind where the Head unit goes, pluged up FM/DAB splitter cable, connected the ISO blocks, switched on and nothing.

Looked at JVC wiring diagram and looked at lead colours on the Morgan side and yes you've guessed it they are not in the standard places. So out with the meter and after checking I find a switched feed off the ignition key, but not constant feed

So I swap the cables around in the block and try the head unit, and it powers up.

But do not seam to have a constant feed
Check it out FM works but what no DAB signal, check blue and white stripe ancillary cable is connected to feed to the splitter and yes it is so the splitter should power on when the unit is on. Check again. I am stumped, either I have a dodgy splitter or I have missed something.
Any advice on what to check would be great.