Door lock and unlock 99 Civic

Hi, I'm kinda new to car security so please excuse me...I'm not sure i understand how the door unlock and lock work on a car. I have a 99 civic with a 790 xv installed on it and was looking at how it was hooked up hoping i can learn something. I found the negative lock and unlock green orange and white green under the dash near the steering wheel column. now it read 5volts both of them. Say I ground the lock with a probing tool should that lock the door? and vice versa with unlock. Just curios? and is it a matter of just connecting the lock and unlock from the alarm module to the lock and unlock of the car and that should take care of the door interms of unlocking and locking the doors? the way it's hooked up is when the system is armed the doors lock and disarmed door is unlocked. I understand how relays, diode, and resistors work if that helps in any explanation. Thanks for your patience. Sach

Well first, the car won't let the doors lock if the driver's door is open. The 2 wires you see are coming from the switch and go to a relay. So they are just triggering the relay with a negative pulse. Also you shouldn't use anything that probes wires that will pass a current. It is not safe.Certified Security Specialist

Always check info with a digital multimeter.

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You are correct in your thinking tho, the wires you mention will activate the locks with a ground pulse. You are reading voltage now due to feedback from the factory lock relays. Yes, in your case it is a simple matter of connecting the lock wires from the alarm to the car. This is not always the case in all cars tho. Also, i belive the locks will work with the door open on a Civic, excluding the drivers door....Mike M2

Tech Manager

CS Dealer Services