Car alarm

[Tangaman]

Car alarm went off at 01:30 hours and wouldn't stop with the key, I had to disconnect the battery. Called the RAC and he couldn't solve the problem. My friend had the same problem with a Ford Galaxy, he changed the battery and the problem stopped. Later I charged the battery and the problem dissapeared so I took the car for a run. When I cot home and locked the car, the alarm started again so I had to disconnect the battery once more.

Has anyone else had the same problem, if so could you please tell me if and how you cured it. Thank you

[pezzzer]

Hi there, it sounds like the alarm is sensing a voltage drop in the electrical system, could be nothing more than a bad earth on the negative strap from the battery. How old is your motor?

[Tangaman]

Thank you for the reply. I thought of the drop in voltage, I checked the battery and charged it but after a few hours the alarm started again. As the car is 2006 I thought the battery was on the way out so I bought a new one but still the allarm went off. I took the car to a Jag specialist and he put the diagnostic on it and found the passenger door mechanism was at fault which was changed, there was also a problem with the ECU, that has now been sorted, at a price.

Thank you once again for your reply. Very bes wishes Tangaman