Viper 791XV & DEI 457G / Door Locks Inop
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=62061
Printed Date: July 13, 2025 at 6:26 PM
Topic: Viper 791XV & DEI 457G / Door Locks Inop
Posted By: chevy1500hd
Subject: Viper 791XV & DEI 457G / Door Locks Inop
Date Posted: August 25, 2005 at 6:26 PM
I have a 2004 2500 HD Chevy Duramax. Have instaled the Viper 791XV with the DEI 457G. I have done the programming to the 457G. The doors do not lock or unlock. Tryed it with & without the diode on the black ground wire. No change. I have the dome light wire connected. Also checked another 457G same problem. The system remote starts fine. What am I missing ?
Replies:
Posted By: chevy1500hd
Date Posted: August 25, 2005 at 6:28 PM
Oh yes I have the wire connected to pin 2 of the diagnostic plug.
Posted By: gus1
Date Posted: August 25, 2005 at 8:29 PM
Try getting your power and ground for the 457G at the diagnostic plug as well. This was about the only thing that got it to work in a GM truck for me.
Gus
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Wherever I go, that is where I end up......
Posted By: chevy1500hd
Date Posted: August 26, 2005 at 4:33 PM
gus1]T wrote:
y getting your power and ground for the 457G at the diagnostic plug as well. This was about the only thing that got it to work in a GM truck for me.
Gus
Thanks Gus, I have rewired the 457G as you said. Both ground & power from the diagnostic plug. NO change  . Remote starts fine, No Lock or UnLock. Also no trigger after the door is opened. I am almost to the point of ripping it all out and throwing it in the trash 
Posted By: mo12v
Date Posted: August 26, 2005 at 4:57 PM
chevy1500hd wrote:
Oh yes I have the wire connected to pin 2 of the diagnostic plug.
Did you verify if PIN 2 was Purple wire at OBD Connector?
Also have you tried Lock / Unlock with doors closed & Key out of ignition ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: chevy1500hd
Date Posted: August 26, 2005 at 5:05 PM
Yep I have checked the PIN 2 wire. Yep have tryed eveything with the doors shut keys out. The Viper will remote start the vehicle fine, just Lock / unlock function not working ?
Posted By: mo12v
Date Posted: August 26, 2005 at 5:54 PM
Are you sure your RED wire has CONSTANT power. Even when the Doors are shut
-------------
MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: chevy1500hd
Date Posted: August 26, 2005 at 7:14 PM
mo12v] wrote:
re you sure your RED wire has CONSTANT power. Even when the Doors are shut
The red (+12) wire going into the 457G ?
Posted By: chevy1500hd
Date Posted: August 26, 2005 at 7:37 PM
The red (+12) wire going into the 457G has power all the time even with the doors shut. I may have something wired wrong, as if i use the Viper remote to lock the doors, I get the "beep" feedback from the Viper. However the dash lights flash. When I use the factory key fob to lock I do not get the dash light flash. Tomorrow I will retrace all my connections. kind of start over ?
Posted By: chevy1500hd
Date Posted: August 27, 2005 at 4:10 PM
Well now I am confused. I have checked & Rechecked all the wires. Everything is correct. It is starting to really P_SS me off !
Posted By: chevy1500hd
Date Posted: August 28, 2005 at 8:55 AM
Hope You all do not get to much damage from Hurricane Katrina. With all the problem' s I am having with my 2500HD & the DEI 457G, I am almost to the point I would drive the truck into the storm ! LOL But Really, I want every one to take and be safe.
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