I've been troubleshooting a random alarm trigger for six to nine months, and am now hoping for advice on anything I've failed to check or could replace.
First, what I've replaced: RCM, the alarm, door lock air pump and glove box light/switch. This has decreased the alarm triggering, so there were probably multiple faults originally.
I've checked inside the tailgate/boot lid area - I can't see signs of water ingress or corrosion.
The door contacts push in and out fine, but I guess could still be replaced (anyone know best replacement sources?). I don't know how to check the lock on the fuel cap or the tailgate catch.
I *think* I've identified that the only conditions most likely (but not consistently) to trigger the alarm are moisture in the air. After those equipment replacements, it now only triggers outside, in the late evening/early morning (sheesh), but not necessarily when its raining.
This suggests that it's an electric contact somewhere?
What are your thoughts?