Hi guys, this looks like a good place to start my thread. My car was recently broken into and the thief took my dvd player out of the dash and busted the dash to s**t. good thing he didnt take the rest of the stereo or the whole car... Anyway, I have plans to beef up the alarm with a backup battery and some extra sirens, and install an ignition kill off of the alarms normally open relay lead. that way the only way the car will run is if the alarm is hooked up and disarmed. My only question is - to use the backup battery (a dei 520T), i need to run a relay off the alarm to the parking lights (the backup battery will not supply enough voltage to run the lights obviously). what kind of relay should i use (normally open or closed)? my thoughts are to use a normally open relay. i know that the wiring in my car has a factory lead from the fuse box to run to an aftermarket alarm for the lights, but does the circuit have a relay already built in or not? Also, will having a relay between the circuit and the alarm prevent someone from disabling the alarm by shorting out the parking lamps?