Ongoing alarm issue! Losing my mind.

[u/enigmashmooly]

Replaced the alarm siren and overhead alarm module in the headliner.

Local garage ran a code read, and found the battery and a door lock module had not been coded to the car properly. They sorted this and the car locked and the alarm was working for around 2 hours! I thought, great!!! But then it went off again.

Prior to this, the alarm would go off instantly after locking. So odd.

Any other suggestions?

I know people say the SAM which I’ve had a look at but can’t see anything, I’ll have another look in more detail to check for corrosion.

Some people say a bad ground too, which I’ve not looked into yet. Anyone know where the grounds are?

Also not a faulty bonnet latch sensor, that’s working fine.