Car: 1998 Mustang V3.8
Security: Securilock Anti-Theft, Remote Keyless Entry.

I use the factory remote control to lock and unlock the door. I installed an after-market alarm system which has the door lock functions. I want the after-market system to control the door locks and trunk (lock, unlock)

Do anyone have a wiring diagram on my car that show the modules in the car that controls the door locks and trunk. I want to tap in before the relays. There should be a location that takes a unlock pulse and a lock pulse. Wiring a car is my hobby background. I need a schematic or wiring diagram

Found website that talks about how to trigger the locks. Quote" Non-keyless verison are 5-wire and the keyless versions are negative pulse" I am not sure what that means. I do know that the after-system sends a negative pulse to lock and unlock the doors. Do my 1998 respond to that type of trigger pulse.
Some of the newer cars will sound the factory alarm (car horn) if you attempt to open the door without the keys or factory remote. There is a negative trigger generated by the driver key door lock or factory remote that tells the factory alarm not to sound. If this is the case, I will also need to know where that tap-in point is located so I can wire in my after-market alarm to generate that same negative pulse upon unlocking and opening the doors.