Hey, I work for a company that designs vehicle tracking devices and I wanted to install one on my Crossfire with the possibility to control the door locks as well. It is possible on our cars to control the locks without confusing the skreem unit?

 

The only way I could see doing it would be to wire a relay in parallel with the lock/unlock switch on the center console. That's the only component that doesn't do a cryptographic challenge/response with the skreem. Hope this helps...

 

If the question is: can a automotive based g.p.s. tracking and communicating device lock and unlock your doors for you, then - Yes - You can get into the driver door harness and hit the same negative trigger wires that the mechanical key uses to activate or deactivate the security and central door lock circuit. this is the location I would use so that the gps device can let you back into your into your car without having the alarm go off (like onstar) . If you use the triggers behind the switch in the console you won't be turning off the security which will trigger the siren and disable the starter. The only challenge - response scenario in this car that I can see is the factory low frequency passive rfid pellet in the key. The remote and the rfid perform two different functions but do live in the same home. The rfid is only a passive device requiring the transponder antenna to excite it , it then resonates at a specific frequency that the skrem unit recognizes allowing the starter circuit to perform. I have also found that the skrem unit doesn't disable anything else but the starter - as my car runs and drives on a no-pellet key if I trick the co*kring ( sorry, - installer humor) by holding my pellet-key up to it during startup. I imagine you could probably steal one these cars by hammering the key switch with a 'morgan knocker' and then bump starting the car !! I'd test it by using my no-pellet key but mine is an auto...