It now won't even attempt to crank. Just all the warning lights coming on but nothing at the key. There is a loud wurring sound coming from the rcm area that i don't know is supposed to be there. It did have an aftermarket immobiliser on it which was taken out because the key fob wouldn't disengage it, maybe it has something to do with that? Didn't go down to the car with any tools like an idiot but all the electrical connectors from the battery seemed in tact and connected though i am also no autoelectrician! Maybe it's time to call them out again