08 mustang gt viper 5900 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=113019
Printed Date: July 02, 2025 at 1:44 PM
Topic: 08 mustang gt viper 5900 alarm
Posted By: motorzjason
Subject: 08 mustang gt viper 5900 alarm
Date Posted: April 09, 2009 at 7:33 PM
Car: 2008 Mustang GT without a factory alarm
Product: Viper 5900 series alarm with remote start (will not be using remote start)
Question: I'm trying to install a Viper 5900 alarm system in my 08 gt and the instructions say to connect the green 14 gauge wire from the satellite relay harness to the key side of the ignition. It doesn't state which wire to tap into. Does anyone know?
Replies:
Posted By: ajstetler
Date Posted: April 09, 2009 at 8:26 PM
It's probably the key side of the cut starter wire. The purple is the starter side of the starter wire.
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Big Al
Posted By: joch1314
Date Posted: April 09, 2009 at 8:36 PM
ditto with ajstetler...that wire goes to the ignition side of the cut starter wire. it should be the dark green in the ignition harness. ------------- ...half of the truth can be worse than a lie. <----Roger Russell said that..
Posted By: motorzjason
Date Posted: April 09, 2009 at 8:43 PM
So whatever wire I tap into and cut for the ignition wire I then splice in this green keyside starter wire to it?
Posted By: mikvot
Date Posted: April 09, 2009 at 9:23 PM
You are cutting the starter wire...not the ignition wire.. Once cut, you will have the key side of the starter wire, and the starter side. The key side is the side coming from the key cylinder. The starter side, is the other side of the cut wire. Green goes to ignition ( the side going to ignition cylinder)) side of the cut wire. Violet will go to the other side of the cut starter wire.
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Posted By: motorzjason
Date Posted: April 13, 2009 at 9:39 PM
Thanks guys, I successfully installed the alarm on the Mustang. Only have 1 issue though.
When I arm the vehicle my remote beeps twice like it's supposed to, then indicates the door is still open with a third beep even though both doors are closed. Any ideas?
Posted By: dtk1
Date Posted: April 13, 2009 at 10:51 PM
what you used for door triger ? dome light ?
Posted By: motorzjason
Date Posted: April 14, 2009 at 5:51 PM
Trigger I used light green and yellow. Dome is the same.
Posted By: ckeeler
Date Posted: April 14, 2009 at 5:57 PM
motorzjason wrote:
Trigger I used light green and yellow. Dome is the same.
this is possibly your problem. light GREEN/ YELLOW is dome light, you dont want to use this. door trigger is yellow/light green and is positive trigger unlike the negative triggered dome light wire.
Posted By: motorzjason
Date Posted: April 14, 2009 at 6:26 PM
Just wired it like you said and it's still doing it
Posted By: ckeeler
Date Posted: April 14, 2009 at 6:31 PM
motorzjason wrote:
Just wired it like you said and it's still doing it
how did the wire you tied into meter with your DMM when you tested it?
Posted By: motorzjason
Date Posted: April 14, 2009 at 6:34 PM
No I changed the door trigger to yellow and light green from GREEN/ YELLOW with the dome light.
Posted By: ckeeler
Date Posted: April 14, 2009 at 6:40 PM
motorzjason wrote:
No I changed the door trigger to yellow and light green from GREEN/ YELLOW with the dome light.
yes i know. how did it meter when you tested it? you did test it before just tying into it right? if you did not test it first how can you possibly know if you tied into the right wire at all? and did you use the positive door trigger input on your unit, or are you still using the negative trigger input?
Posted By: motorzjason
Date Posted: April 14, 2009 at 7:00 PM
Disconected the negative door trigger input leaving the positive connected and now it arms fine
Posted By: motorzjason
Date Posted: April 21, 2009 at 12:26 AM
First off I want to say a big THANK YOU to ajstetler, dtk1, ckeeler, mikvot, and joch1314 here at the12volt for their assistance with the wiring on our 08 Mustang GT. Thanks guys!
Since we could not find any videos online regarding the installation of an alarm system on a Mustang, Chris and myself at MOTORZ TV performed a how to installation of a Viper 5900 alarm system on a 2008 Mustang GT. We wanted to show enthusiasts out there that a car alarm is not all that hard to install but does take some time sorting out the wiring. Once that's done, everything else is pretty straight forward.
Here's a link to the video.
https://www.motorz.tv/play/viper_5900_car_alarm_installation
Thoughts, comments, and suggestions are welcome.We mentioned the12volt towards the end of the video. Again, thanks for the help guys!
Posted By: mikvot
Date Posted: April 21, 2009 at 10:10 AM
I see no mention of the most important tool during an install. The multimeter. Also, did you finish the remote start portion of it? If so, it's not gonna remote start when armed. You reversed the ignition side and starter side. Other than that, very well made video. Good job!
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Posted By: motorzjason
Date Posted: April 21, 2009 at 6:47 PM
Thanks! We're not using the remote start on this vehicle although it came with the kit.
Posted By: ckeeler
Date Posted: April 22, 2009 at 10:31 AM
motorzjason wrote:
First off I want to say a big THANK YOU to ajstetler, dtk1, ckeeler, mikvot, and joch1314 here at the12volt for their assistance with the wiring on our 08 Mustang GT. Thanks guys!
you're very welcome.
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