electronic door lock

John - thanks....this is what I'm going to try..

from an espace (the receiver module looks the same as the GTA)

Hi Dave
Yes, worth a try, as I said before, it will either work, or not work, or at worst, blow a fuse, but I am now coming round to the view that anything that looks the same, even the 610 type, is worth a try, as long as you dont have to spend a fortune on it. I am sure we will all be interested in your findings
John