using this forum as a collection of thoughts...
Here's the break down, the shock sensor you have has the basic wires, red for pos, blk for ground, and the other 2 wires are probably negative trip wires. You'll have to get the wire diagram of the factory alarm and find out where the brain to the alarm is at. Then figure out which wire is the Negative trip wire. Most of the newer alarms have dual zone shock sensors which allow your alarm to chirp if the 1st zone is tripped and then the 2nd one will go off if somebody is beating on a window or something to that effect. You'll have to have the wire diagram for the original Factory alarm so you'll know what wire your looking for coming out of alarm brain. You cannot and I wouldn't suggest trying to guess, there are to many wires and most factory alarms are just like the aftermarket, they are mass produced and have both negative and positive triggers for all different makes and models. If you get the wire diagram you'l have to hook the sensor up then tap the sensor to figure out which wire is for the 1st stage and which is for the 2nd stage you should cross them and if you do it's no big deal the alarm will sound off when tapped lightly instead of chirp a few times. The sensor you have looks like an aftermarket sensor and you can clip the harness off the end and tap into your alarm. I hope this helps you and I didn't confuse you any. If you need any other help let me know.
