Quote:
Do not do this.


I think that fitting a flashing LED saved me a load of hassle.

I had a 3 yr old car that was broken into (ISTR) four times in the first 18 months I owned it. The after-market alarm that was fitted was triggered by vibration sensing and monitoring of the +12v line's stability, but it had no LED warning. The vibration sensing was turned right down to prevent false alarms on windy days and the voltage sensing didn't always trigger just with the courtesy light. On one occasion the bastards got as far as breaking the steering lock before the vibration triggered the alarm!

After fitting a flashing LED there were only another 2 break in attempts in 10 years and these looked like opportunist thieves trying to see what was in the glove box.