Hi all, I've got a 2002 Discovery TD5 and tonight when I returned to it, unlocked as usual and when I got in the alarm went of constantly, bang doors shut and it went off but as soon as I moved inside it started again, very embarrassing! I undid front grill and disconnected both sounders and came home. It locks and unlocks fine and immobiliser light on dash flashing as normal. I guess it may be an earth fault but where? 