2007 Grand Voyager 2.8CRD (2006 model ) - RG
Twice now the alarm has 'detonated' after unlocking the car. Relocking does not reset it. Fortunately the immobiliser does not initialise, therefore I was able to drive it with the alarm sounding and the flashers going. After around 3 miles the alarm just switches off. After the first time I changed the fob battery and assumed that was the cause but today, three days later it just went off again. This is a U.K .vehicle. and has the Thatcham alarm system fitted Any ideas please ?