Hooking up Headlight Alarm LED's

These are from Streetglow. I know how to hook these up to a car with an aftermarket alarm. But I am trying to put them on a car that has a factory alarm. I need to find a wire on the vehicle that produces a constant negative output when the OEM alarm is armed. Does anyone know where I can find this kind of negative wire on a 2002 Cadillac Escalade?

you can activate the leds when the car is off and the doors are locked (using the unlock /lock motor wires and ignition wiresThere are 10 types of people in the world, ones that understand binary and ones that dont.

or just hook them up to you ignition constant and switched ignition. what way they will come on then you turn the car off. p.s. this only works if the ignition switched turnes to neg when off.. which most doWhy oh Why didn't i take the blue pill

Darren Power