Preventing alarm while getting gas
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=5680
Printed Date: August 03, 2025 at 1:12 PM
Topic: Preventing alarm while getting gas
Posted By: cpgoose
Subject: Preventing alarm while getting gas
Date Posted: November 20, 2002 at 8:26 AM
Ok, I know this is very weird....but it drives me nuts. I hate how my alarm arms when I get gas. (1)While I'm sitting in the car, I have to disarm it before I start the car again. OR (2) Sometimes I get out to clean the windows and stuff, and then I might get locked out. I guess I could open the door a little or something, but I'd rather install a SWITCH  . So, can I install an ON/OFF switch that will give the alarm a signal that will mimic the door being open? (So I guess that would be a ground signal). I guess this is sortof like being in valet mode without really being in valet mode.
Replies:
Posted By: philly
Date Posted: November 20, 2002 at 8:35 AM
what kind of alarm is it? it's on passive arming, it should be as simple as reprogramming the alarm.
Posted By: Velocity Motors
Date Posted: November 20, 2002 at 8:36 AM
You have the auto arm feature engaged. This feature auto arms the system after the ignition is turned off. Is this the Viper 550 ESP system ?
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: cpgoose
Date Posted: November 20, 2002 at 8:49 AM
yes (that's the alarm), but i would like to keep the auto-arm feature if i ever get out of the car, and forget to arm it  This would just be a temporary disable so the alarm wouldn't "auto-arm" in certain instances where I don't want it to do that....I just want to trick it.
Posted By: Velocity Motors
Date Posted: November 20, 2002 at 9:06 AM
Leave the ignition on while you sit in the car while getting gas. This way the system won't passive arm itself.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: cpgoose
Date Posted: November 20, 2002 at 9:12 AM
True. But if I wanted to take the long way around, and use a switch  , could I just put a switch inline with the alarm's door wire? Then, if the door is shut, and I flick the switch, the alarm will get a (---) signal, and think the door is open.....and not arn. Or will that not necessarily give a (---) signal if the switch is flicked....but rather just neutral? (and no, i don't use forced passive arming which will arm even though a door is open).
Posted By: sufferrar
Date Posted: November 20, 2002 at 11:07 AM
ok cpgoose - here is what i did - i had the same problem usually an alarm comes with + and - door trigger. if your car is - trigger then you obviously will not use the + wire ( i think this wire is purple) Take the purple wire and hook in up to the ignition so that when the key is out the ignition ,the purple wire will see a + signal . it would be just as opening a door . when the key is in the ignition then the wire will see no signal and think that the door is closed. this method uses the ignition and key as a switch but uses the + door trigger. Alternatively you can hook up the same purple wire to a switch and 12v for the same results.
Posted By: chriswallace187
Date Posted: November 20, 2002 at 3:40 PM
This will depend on the vehicle, but sometimes if you leave the interior lights on, the alarm will think the door is opened and therefore will not passive arm. I would try this before doing any rewiring/reprogramming. ------------- C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: NyxBass
Date Posted: November 20, 2002 at 4:38 PM
I just leave my door open, but it would be as simple as making a switch inline that creates the illusion of the door being open (i.e. if you have negative pins, just a switch that grounds the door lead). I would just be careful of this because it would be easy to forget about the switch. You might want to get a dpdt switch and hook one side to 12v+ and use a little led somewhere in the dash to let you know that you have the door bypassed. Also, on most alarms, if you were to forget this and arm the alarm, that zone would be sensed as faulty and not be armed, which means anyone could open the door without triggering the alarm. If you think you can remember to turn it off, or wire in an indicator led, I think you shouldn't have any problems.
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/NyxBass
Posted By: the12volt
Date Posted: November 20, 2002 at 5:20 PM
cpgoose, to avoid the door trigger issue, you could use a toggle switch to trigger a relay to open the alarm's igniton lead and supply 12V+ to the alarm side of the lead. When you go to arm it and if you had forgotten about the switch, the alarm will not arm. You could also incorporate an LED with this as NyxBass suggested. 30 to alarm's ignition lead
87a to ignition
85 & 87 to constant 12V+
86 to ground from switch the12volt
Posted By: Aznpanther98
Date Posted: November 21, 2002 at 12:28 AM
just start making it a habit to use ur remote to arm or just leave the key in the ign, i don't have an alarm yet ndplannin on installinit myself so might needsome of u guys help but i made it a habit of pressing the door lock when i get out of the car but lately i keep forgetting that my keys are still in the car on the seat or leave them in there when i go play ball and have locked myself out a couple times in a month
Posted By: SOUND PRESSURE
Date Posted: November 21, 2002 at 12:35 AM
Hey cpgoose, When you get out of your car press 1,2,1 on your remote which will activate your valet mode on your viper 550 esp. Your led will be on constant letting you know that you are in valet mode. ------------- Sound Pressure
You know you have the right amount of pressure when your eyes start to water! Now you've got Juice!
Posted By: cpgoose
Date Posted: November 21, 2002 at 1:28 PM
wow, thanks for all of the ideas! Gotta do some thinkin' now as to which one fits best and is most practicle.  I'll let everyone know if I implement one.
Posted By: cpgoose
Date Posted: November 21, 2002 at 2:01 PM
so can I just do this? (following NyxBass's post) 
I wasn't sure if I could just "piggyback" the alarm's wire....or if I had to run the switch "inline".
Posted By: Chris Luongo
Date Posted: November 21, 2002 at 5:10 PM
I like chriswallace187's idea best, and I hadn't even thought of it---just switch the interior lights on. Also, you could find the key sense wire coming from the key cylinder; it's probably a negative signal. Using diodes as appropriate, wire it into your alarm system as an additional door trigger. The alarm won't passively alarm if you leave your key in the ignition. As an added benefit, if a thief should somehow get into the car and insert a key, your alarm will go off.
Posted By: cpgoose
Date Posted: November 22, 2002 at 6:21 AM
yea, i don't think the domelight trick works in my car.
Posted By: jimmythegreat1
Date Posted: November 22, 2002 at 8:47 AM
the best thing is to try turning on the dome light and see if that fools the alarm first into thinking the door is open.
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Posted By: GheTToBaSS
Date Posted: November 23, 2002 at 12:39 PM
I was just wondering, is there any way you could wire the door sensing trigger on the alarm to include the gas door also? So if the gas door is open, the alarm wouldn't automatically arm?
Posted By: alarmpro
Date Posted: November 24, 2002 at 7:09 PM
Dangerous putting a pinswitch on the gas door because even a small spark their could cause an EXPLOSION!!! Pinswitches usually spark really small that you can't even tell but will cause an explosion... Even electric static close to the gas opening will cause an explosion!! not worth the trouble or the Danger just ground the doorswich and trick the alarm .... Lot Safer!!!
Posted By: cpgoose
Date Posted: November 25, 2002 at 6:25 AM
ay caramba! 
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