howto: disable factory alarm (confirmed on 1st and 2nd gen) - 3000GT/Stealth International Message Center
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Old 10-22-2007, 08:35 AM   #1 (permalink)
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Default howto: disable factory alarm (confirmed on 1st and 2nd gen)

i've figured out how to disable the alarm on my 98 gt sl... i can't guarantee that this work for all other years, but it's worth a shot

i've tried the mod where you ground the light green wire on the etacs... that did nothing for me...

i decided to go another route. i figured that since i can disable my alarm by turning the key in the trunk that there has to be a way to make it permanently send the signal to disable the alarm...

tools i used:
* a small flathead screw driver
* a phillips screwdriver
* a small pair of pliers
* 4-6 inches of wire
* one splice wire fitting
* one ring terminal

so i started taking the panel off that covers the latch for the trunk. it really wasn't that hard to take off. i just had to take out the plastic "trays" from the trunk as well as the spare tire then i had access to all of the screws that i needed. i used a small screwdriver to pop off the 4 screw covers on the top of the panel. there are two screws on each side under the access panels, two on each side of the cover itself, two that you get access to after removing the trays if i remember correctly there are a total of 12 screws that hold the panel on.

once you have the panel off, you need to locate the wires for the trunk's alarm sensor. here is a picture of the alarm sensor and shows which wire you need to tap into and ground:



if you notice, i took this picture as if i was sitting in the trunk facing the back.

here is a closeup of the wire that i had to tap (looking down on it):



all i used was a 14-18 gauge wire tap and i grounded the blue/red wire.

now the car thinks that the alarm is being turned off all the time

Last edited by mbentley; 04-29-2010 at 02:22 PM.
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Old 10-22-2007, 08:42 AM   #2 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Thanks for the write up..i'll need to do that sometime.
I have an aftermarket alarm, and I have had problems with the factory and a/m alarm conflicting. Such as when I accidentally lock the car using the door buttons (or actually, a friend will do that), then I go to unlock the car with my a/m alarm but I am not using the stock FOB so the alarm will sound when I open the door
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Old 10-22-2007, 08:46 AM   #3 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Hmm...if the stock alarm weren't damn near useless this thread would alarm me..
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Old 10-22-2007, 08:55 AM   #4 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Quote:
Originally Posted by s5pitfire View Post
Thanks for the write up..i'll need to do that sometime.
I have an aftermarket alarm, and I have had problems with the factory and a/m alarm conflicting. Such as when I accidentally lock the car using the door buttons (or actually, a friend will do that), then I go to unlock the car with my a/m alarm but I am not using the stock FOB so the alarm will sound when I open the door
sounds like this would be something that might find beneficial

btw, i've tested this a few times by locking the car door with the key fob, waiting to let the alarm activate then reaching in to unlock the door and opening it. with the wire grounded, it never goes off. if i unhook it, it goes off just as before...

so far, my alarm hasn't randomly gone off on its own either
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Old 10-22-2007, 09:58 AM   #5 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

OMG thank you. Now I wont be so afraid to open my doors after I shut off the aftermarket alarm without putting the key in the door first. YaY I'll have keyless entry again!
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Old 10-22-2007, 10:30 AM   #6 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Quote:
Originally Posted by RebelExtrm02 View Post
OMG thank you. Now I wont be so afraid to open my doors after I shut off the aftermarket alarm without putting the key in the door first. YaY I'll have keyless entry again!
please post back after you have done this and let me know if it worked for you. i don't have any other 3/s's to test on...
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Old 10-22-2007, 12:20 PM   #7 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

You da man!
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Old 10-22-2007, 12:23 PM   #8 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Is this sending a constant stream of power to deactivate the alarm? Wouldn't it normally just send a quick jolt of power?
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Old 10-22-2007, 12:56 PM   #9 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Quote:
Originally Posted by CryoVenom View Post
Is this sending a constant stream of power to deactivate the alarm? Wouldn't it normally just send a quick jolt of power?
i am not 100% sure of how it disables it to be 100% honest. i'll have to pull out my multimeter to find out what it's really doing. i did notice that now my green "security" light does not come on when i lock the doors so basically it never enables in the first place. i haven't noticed losing any other features by doing this modification. if anyone else tries this, please post back with your results as i am curious to see if this disables the alarm on other models/years...

thanks.
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Old 10-22-2007, 01:37 PM   #10 (permalink)
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Default Re: howto: disable factory alarm (non-1st gen)

Please add this to the Wiki:

http://www.3si.org/wiki/index.php/Main_Page


If you are not familiar with how it works, just cut-n-paste it in and I'll come back and format it for you.
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