I have a grand voyager 05. My car alarm keeps randomly going off,doesn't matter if cars locked or unlocked . I'm unable to turn it off and just have to let it stop its self. Even if I start the engine it continues to alarm. I've changed key fob battery and made no different. Also the alarm doesn't sound normal when going off, almost like a hard dead alarm and there's a clicking sound when it's going off. I have contacted 2 garages who can't help but one is willing to look tomorrow, is there anything I could mention to help them fix the problem as it seems most places don't like helping to fix these cars? I haven't a clue about cars , this is my first car and I've had it 3 years.
Thank you.