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Viper 790XV GND when Armed


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pinchy 
Member - Posts: 34
Member spacespace
Joined: April 06, 2003
Location: United States
Posted: May 14, 2003 at 4:48 PM / IP Logged  

I was wonder if the orange "ground when armed" wire coming out of the Viper 790XV brain unit is actually GND when armed?  Or is that a signal wire that triggers an external relay that connects to ground when armed?

I'm just trying to install the the motion/tilt sensor and it needs an armed when ground wire and I was wondering if it's as easy as just splicing into the orange wire.

jaxman 
Copper - Posts: 185
Copper spacespace
Joined: November 16, 2002
Location: Denmark
Posted: May 14, 2003 at 4:54 PM / IP Logged  
Yes , the Orange it is ground when armed.
If adding a sensor to the orange cable be sure to insert a diode between the upper point of the insertion and the starter killer relay so the relay won't send back a positive signal.
pinchy 
Member - Posts: 34
Member spacespace
Joined: April 06, 2003
Location: United States
Posted: May 14, 2003 at 6:30 PM / IP Logged  

Oh, didn't know that I needed a diode there.  Thanks.  Is that because switching the relay is a heavy enough load to create a back emf pulse?

auex 
Platinum - Posts: 5,041
Platinum spaceThis member has made a donation to the12volt.com. Click here for more info.spacespace
Joined: December 23, 2002
Location: Arizona, United States
Posted: May 14, 2003 at 6:37 PM / IP Logged  
Uh, the orange wire is in series with the starter kill relay and basically when the car is not starting the wire will see a ground from the starter. The diode prevents the ground from affecting other sensors such as window modules.
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pinchy 
Member - Posts: 34
Member spacespace
Joined: April 06, 2003
Location: United States
Posted: May 14, 2003 at 9:03 PM / IP Logged  

Awe man, I'm confused even after reading all the previous diode posts and the app note page. 

Sorry to ask such a newbie question, but are you talking about a diode across the starter kill relay coil?  Or are we talking about putting a diode inline (on the ground when armed wire) to the sensors, so when the relay is energized, the sensors won't receive12V on the "ground when armed" wire?

pinchy 
Member - Posts: 34
Member spacespace
Joined: April 06, 2003
Location: United States
Posted: May 14, 2003 at 9:25 PM / IP Logged  

Viper 790XV GND when Armed -- posted image.

Do it like this?


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