Engine won't switch off
 

Hi I have a 2001 saxo 3 plug ecu vtr to single plug ecu
Now engine won't switch off even when I kill the battery isolator how can it switch engine off apart from new ignition barrel

wired up wrong lol Wiring diagram if you look at the top left of the diagram fuse F10 you must have a permanent live there it powers the main double relay for the engine/ecu or as you recon the key barrel is causing it to be live

It's 100% faulty ignition barrel as heater and rear screen intermittently were not working new barrel and all working and even switching off but thanks for input