disarm with other wireless system

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=113101
Printed Date: September 12, 2025 at 11:06 PM

Topic: disarm with other wireless system

Posted By: koroww
Subject: disarm with other wireless system
Date Posted: April 13, 2009 at 3:39 AM

Hello,

I want disarm my Viper 550ESP with momentary negative pulse without remote fob. I installd 550ESP and wireless keypad valet system for my famly. Vallet has Factory Alarm Shut Down negative pulse output when unlock with keypad.
I reproduceduse disarm with ignithon on and one pulse valet program button (programmed to the one pulse with the future menu) use two 5 pin relay and cut ACC and valet wire and positive pulse to module side valet/program gray wire and yellow ACC wire on five color 550 remote starter relay harness. but full alarm when unlock with key pad during 550 arming.
Please advice.

Replies:

Posted By: i am an idiot
Date Posted: April 13, 2009 at 4:03 AM

Not that it will help us tone, since you are in Japan, But what kind of vehicle, and do you know what that vehicle is called over here in the states?

Posted By: koroww
Date Posted: April 13, 2009 at 4:44 AM

Thank you for reply. I installd for my VW 93y Eurovan CV inport from USA. but I want to know just control of viper 550. Thanks again,

Posted By: KPierson
Date Posted: April 13, 2009 at 5:17 AM

The only way I've ever heard to do it is to install a keyfob in the vehicle and use a relay to actually "push" the disarm button on the keyfob.

You would want to power the keyfob with the car battery (so you don't have to worry about dead batteries) and then you just need to solder two wires - one to each side of the "disarm" switch.

The only other alternative I can think of would be to replace the 550esp with something that has a disarm wire - I know the older Audiovox units had them (not sure if the new ones do).

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Kevin Pierson

Posted By: howie ll
Date Posted: April 13, 2009 at 1:03 PM

If I'm right, the Eurovan is AKA Mercedes Dodge Sprinter

Posted By: koroww
Date Posted: April 14, 2009 at 2:44 AM

kevin,

Thank you for kind reply. I installed Viper 800ESP in my Taurus wagon that can disarm or bypass torriger with one wire that you said. It is the easiest to replace it for 550..... Isn't there any way of silent with one negative toriger except keyfob surgery....

Posted By: KPierson
Date Posted: April 14, 2009 at 6:55 AM

The problem is that including a (-) to disarm wire greatly compromises the security of the system - that is why you won't find it on most systems.

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Kevin Pierson