Today I removed the passenger side door trim and speaker as I was doing some work on the door. I've left them off and now when I lock the car on the remote its fine for 30 seconds and then the hazards start flashing (at the same rate as they do twice when the car is first locked). This hasn't happened before. I've read on other posts that the alarm siren could be faulty - but why now? Is it co-incidence or have I disturbed something in the door? Also, how can I now lock the car without this happening - will disconnecting the siren be a short term fix?