Hi Andrew, you don't mention if the central locking works. If central locking works then the fuse is OK. Normally if immo function is removed from ecu then Immo input to ecu is cut to prevent confusion this is pin 73 on the ecu small connector. I would suggest doing this before anything else. I'm sure that I didn't have to power up the starter relay when I had the immo removed from a MEMS 3 ecu. Regards, SteveL.