Originally Posted by GraphiteGhost

George, If I remember, doesn't the alarm goes off when you take the positive cable off the battery (simulating a thief cutting the cable from under the car to break into or steal something) first? If you remove the neg first it doesn't alarm, right? If this is so, then how does the alarm 'silence' when folks are removing the fuse numbered '9' and it does not actuate the alarm? I've never tried to 'if this then that' the normal operation of the alarm module. I do know sending 12v down pin 3 if it is triggered by a ground signal, just might cause an expensive end result. Or am I being a little too cautious? Only reason I ask, this might help understand the 'logic' involved when DC is properly connected and then an input (whatever it is) comes through pin 3 of the module in its 'normal' operating conditions. I believe the battery is in the alarm module to power the siren when that 'abnormal' condition is sensed. This is in the siren's circuitry. Is it a simple switching circuit, I don't know. I also don't know what condition 'activates' the internal batteries to sound the alarm, and for how long if 'power' is cut.
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