I have the shock sensor for the theft deterrent thing in my car and I was reading in the book about how to arm it and everything but all I've seen has to do with electric locks and stuff.. unfortunately my car has manual locks so I was wondering if there is any way to arm it or anything or if it is pretty much pointless in my car.. I can lock the doors and play with the shock sensor all i want and nothing really happends.. the LED on the sensor blinks and stuff but whats the point?