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Connect the power door lock to car alarm?

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=13463
Printed Date: July 26, 2025 at 12:10 PM


Topic: Connect the power door lock to car alarm?

Posted By: harrylui
Subject: Connect the power door lock to car alarm?
Date Posted: May 13, 2003 at 12:12 AM

I bought an alarm system for my car. I installed it and everything work nice and well. The system is a Audiovox TSP 575 which costed me $30 to get.

The system has an option to hook up to a door lock interface that connect the siren control module to the power door lock system of the car which add on a keyless entry feature so it can lock and unlock the door when the system is being armed and disarmed.

The problem is that NOBODY sells that door lock interface unit. (AA 9158) Or it is VERY expensive.

I feel that I can make a door interface unit myself, I just need to know what parts I need.

There are two wires come out of the siren control module (1 pos and 1 neg, 12v) and they switch from positve to negative and neg to pos depend if the system is armed or disarmed.

Now, I have the power door lock in the car. I took it apart and it has 3 wires. 2 Pos and 1 Neg, 12v. 1 pos (let's call it A) control the locking process and the other Pos (B) control the unlocking process.

What I need is, that a circuit system that controlled by the 2 wires from the siren and can temperory connects A to the Neg when the system is being armed and B connect to Neg when the system is disarmed. I just need them to connect for half a second or so because I don't want to burn out my door lock motors.

So, how do I go about making this unit. What parts do I need, where can I get it, and how much $$$ am I looking at?

Thanks for your time.

I have a 93 Saturn SL2 if that matters.




Replies:

Posted By: jaxman
Date Posted: May 13, 2003 at 2:36 PM
Don't need to build the system yourself :) It is allready built or it is easy to build.

Go here :
https://www.directed.com/guides/igs.asp
Download an installation guide for a Viper 300 ESP for example and see how to make your power lock to work.

Good luck.



Posted By: harrylui
Date Posted: May 13, 2003 at 6:26 PM

Doesn't work.

The alarm doesn't give out "PLUSE" voltage.  It gives out "CONSTANT" voltage.  One positive and one negative.

I need something that give me a PLUSE whenever the voltage on the two wires changes.  That would SLOVE all my headaches.




Posted By: jaxman
Date Posted: May 14, 2003 at 12:37 AM
Then buy a central lock box frome a store.This will generate the pulses from a ground. Then isolate the wires from the alarm with 2 diodes so it will only sent out ground , for lock and unlock.


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