Ok
All good
No need for any resetting
Got sidetracked by watching this video :


Turns out the engine hook is not grounded.

Battery itself will be difficult (Impossible?) to access without opening the tailgate

Hello I was unable to remotely unlock the car ( 2004 XC 70) with the remote. Got in with the key......no crank response on turning key ( interior lights/ dash warning lights turn on) Thought it was the remote battery so I changed it.....still no response I then noted that I had left the lights on so...