Auto Antena

Geez it's so quiet in here!
I've replaced my stereo with a Kenwood 10 Stacker and head unit, but my auto antenna doesn't get a circuit.
It does work, and there is a signal coming from the head unit, so just to double check, does anyone know which wire in the OEM loom that the antenna power lead plugs in to?
I'm beginning to think it's a remote relay that may be at fault, but I can't find one or a dedicated fuse for the antenna.
Any suggestions?

Thanks.

Ken.