wiring viper 791xv relay to always off
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=66836
Printed Date: November 03, 2025 at 10:44 PM
Topic: wiring viper 791xv relay to always off
Posted By: *hss*
Subject: wiring viper 791xv relay to always off
Date Posted: November 22, 2005 at 8:46 PM
Just like the title says. I would like to know how can i do that? I suspect wiring another relay? I just find it kind of lame that if a thieve disconnect the brain my car will start right up. I wire my last 791 as per instruction and i find their method weak.
Replies:
Posted By: redpeppers
Date Posted: November 22, 2005 at 11:51 PM
english man english......if u are worried about someone disconencting batt......get a back up batt. pack....they work nice......
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Where theres is a wire there's a way.
Posted By: chriswallace187
Date Posted: November 23, 2005 at 4:25 AM
You could wire a standalone starter kill relay separate from the viper's. All you need is the relay and a toggle switch. Hook it up as follows:
87a, 86 - key side of cut starter wire
30 - starter side of wire
87 - not used
85 - one side of the toggle switch(the other side of the switch goes to ground).
Hide the toggle switch somewhere away from the alarm brain and you're golden.
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: dare_ds69
Date Posted: November 23, 2005 at 4:39 AM
do it a fuel cut off.
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how own your mind, control your life.
MECP certified. always use a DMM
Posted By: gus1
Date Posted: November 23, 2005 at 7:04 PM
Or... use the ground when armed off either the brain, or the satellite harness.... wire up a normally open, not so failsafe relay for your starter kill.
Gus
PS: The main thing is to put the brain in such an akward place that unplugging it or even finding it is a very aggrivating experience.
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Wherever I go, that is where I end up......
Posted By: *hss*
Date Posted: November 23, 2005 at 7:31 PM
redpeppers wrote:
english man english......if u are worried about someone disconencting batt......get a back up batt. pack....they work nice......
it seems like everyone else understood what i meant. where in my sentence did i mention batt? seems like MY english is fine.
Posted By: *hss*
Date Posted: November 23, 2005 at 7:35 PM
so basically i got to wire another kill switch/relay after the satilite relay? Man I like the clifford g4 setup better where there relay is normally open. Also I am going to hide the brain real well. I was thinking of using my window up button as my "hidden" switch.
Posted By: chriswallace187
Date Posted: November 23, 2005 at 10:44 PM
The 791xv, and every other Viper I've ever seen, are not capable of doing normally open starter kills. You can interrupt the starter wire with a second, toggle-switched relay if you like.
I second the other opinions about why you shouldn't do a fuel cut-off...an intact starter kill will keep the car off just as well as a fuel cut-off without the running hazard.
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: 76eldoconvertfi
Date Posted: November 24, 2005 at 6:42 AM
chriswallace187 wrote:
The 791xv, and every other Viper I've ever seen, are not capable of doing normally open starter kills.
Uh, the Viper 5000 can. 
Posted By: chriswallace187
Date Posted: November 24, 2005 at 12:58 PM
chriswallace187 wrote:
The 791xv, and every other Viper I've ever seen, are not capable of doing normally open starter kills. You can interrupt the starter wire with a second, toggle-switched relay if you like.
I second the other opinions about why you shouldn't do a fuel cut-off...an intact starter kill will keep the car off just as well as a fuel cut-off without the running hazard.
My statement still stands; I've never worked with a 5000. That's pretty cool that they are offering that now. The 791 has the starter kill integrated with the miniature relay satellite. ------------- C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: kgerry
Date Posted: November 24, 2005 at 2:05 PM
the new DEI products have selectable normally open or normally closed so you can chose.... there are positives and negatives to both..... personally i would still wire it normally closed so that if the alarm happens to screw up or blow a fuse the customer can still drive their vehicle....
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Kevin Gerry
Certified Electronics Technician
MECP First Class Installer
Owner/Installer
Classic Car Audio
since 1979
Posted By: *hss*
Date Posted: November 24, 2005 at 9:15 PM
anyone know where can I purchase a relay that can withstand enought current to handle the starter wire?
Posted By: *hss*
Date Posted: November 24, 2005 at 10:55 PM
ok thanks!
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