94 Chyrsler LSH factory disarm wire

I'm trying to find out where to find a wiring diagram that shows the factory alarm system for my 94 LSH. The car has a factory keyless/alarm system on it and I have already instaled an aftermarket alarm. As of now when I arm the car with the aftermarket remote it arms the factory system and I have to use both the aftermarket and factory remote to dissarm. I have found the box I beleive is the factory alarm on top of the dash on the pass. side and I have tryed every combination of wire to turn off the system but no luck. Also I don't know if this means anything or not but when I bought this car the owner told me that if I ever lost the factory remote I would be in trouble cause the factroy alarm always arms itself when the doors are locked and it wont shut off without the remote. I thought most factory alarms would deactivate if the key was used in either the drivers or pass door? This doesn't work on my car. Thanks for any help.