2003 defender 90 central locking Ecu programming query

Hi
If you take a ecu imobiliser green box from a donor defender and that defender doesn’t have central locking will that mean it won’t work on a defender that has central locking as can’t get central locking to work from key fob
Thanks

Have you programmed the fobs with a Nanocom.

I took it to a garage and he said he coded the box in but the central locking doesn’t work from the key fob
It did before I changed the green box but he said it was probably because it came from a defender without central locking so I have to lock with key now and a noticed the imobiliser light doesn’t come on the dash

That may be the case but did they code the key fobs to the box.

Hi
He said he did but why isn’t it working then and no flashing light on dash ??!! Strange