1998 Mustang OEM security gone loco
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=41416
Printed Date: June 21, 2025 at 7:00 PM
Topic: 1998 Mustang OEM security gone loco
Posted By: MN_Wild
Subject: 1998 Mustang OEM security gone loco
Date Posted: October 22, 2004 at 11:10 AM
1998 Mustang Cobra Convertible Whenever the power locks are used to lock the doors the factory security will arm. (using fob or the button inside the car) Problem is no matter what I do after the theft light on the dash goes out (approximately 30 seconds after locking the doors) Foatory panic / alarm kicks in with the horn and lights flashing. This is driving me nuts because I cant figure it out. One solution I have considered is to unhook the factory module in the trunk and just use an aftermarket system. Will that sure my problems you think? Does the car get crazy if the module is disconnected? Any insight or ideas to help me would be appreciated. Thank you Chris wild_mn at comcast.net
Replies:
Posted By: Velocity Motors
Date Posted: October 22, 2004 at 12:07 PM
I don't know what your trying to say about your problem ? Your saying that the OEM THEFT LIGHT goes out when armed ? That's the only problem ? The theft light is for the PATS system not the OEM security system. Please elaborate.
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Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: MN_Wild
Date Posted: October 22, 2004 at 12:28 PM
What my real problem is if I use any method to lock the doors other than the key in the door or just pushing down the lock the factory "panic" systen will kick in about 30 seconds after the door is locked. I cant figgure out what it tripping the security. Normally the horn honking alarm thing wont trip unless a door is opened but mine goes off for reasons unknown. I close the door hit the remote lock button and 30 seconds later the horn is honking and the lights are flashing. Hopefully that helps some. I see your in Canada, I love it up there.....Especially when I get the chance to have a few Kokanees. Thanks for any help you can provide....
Posted By: Velocity Motors
Date Posted: October 22, 2004 at 1:35 PM
Mmmmmm.... Kokanee  . Any way, sounds to me like there's a door trigger falsing out your GEM module. Have you seen if the dome light is triggered in the 30 minutes ? You may need to sit in the car with a DMM to monitor the voltage on the door trigger wire or the trunk trigger wire to see if it tests 12 volts after 30 minutes. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: MN_Wild
Date Posted: October 22, 2004 at 1:45 PM
The mustangs didnt get a GEM till 99.....or so I was told. I have a module in the trunk left rear side with the factory module. I have an installer friend coming over tomorrow and were going to trace the wires to see hwat we find. He has the tech soft program with the wiring diagrams. I will double check the door triggers tonight though (gray or blue\org I believe). Problem is it only takes 30 seconds then all heck breaks loose.....maybe I should disconnect the horn. The unlock button or key in the ignition will deactivate the panic. Thanks you
Posted By: mo12v
Date Posted: October 22, 2004 at 5:18 PM
Does the Alarm trip when U LOCK the doors with the Power Door Lock / UNLock Button on the Door?
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MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: MN_Wild
Date Posted: October 22, 2004 at 5:24 PM
mo12v] wrote:
oes the Alarm trip when U LOCK the doors with the Power Door Lock / UNLock Button on the Door?
Yes, if I use any power method to loch the doors the alarm will trigger about 30 seconds after the door closes. Example #1, I open the door, lock it with the buttin the inside, close the door and 30 seconds later the factory alarm goes off Example #2, I close all the doors and hit lock with the remote (once or twice it doesnt matter) and 30 seconds later the horn is blaring. Thanks for any assistance you may be able to lend Chris
Posted By: mo12v
Date Posted: October 22, 2004 at 5:42 PM
Under Hood light? Trunk Lite? Glove box Lite? Is anything on when U Lock vehicle? 30 second trip is almost like Panic
Do U have both Remotes? ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: MN_Wild
Date Posted: October 22, 2004 at 7:46 PM
I only have one remote and its not the factory original. I dont have an underhood light. I will check the trunk. I figgured since it doesnt even require the remote to replicate the problem that the remote is probably not at fault. I will also check the glove box. Thanks again
Posted By: mo12v
Date Posted: October 22, 2004 at 8:20 PM
Might sound D U M B, but I was wondering if Remote is sending signal when bumped or if it is on all the time. We have a unit that checks frequency and Remote functions. I have seen them stick. Or U could take out battery / s JUST THINKING........Long shot ------------- MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: MN_Wild
Date Posted: October 22, 2004 at 8:32 PM
Long shot but a good idea. I will try it. I just checked the truns switch tht operates the light and its fine. I checked it with a meter and it functioned normally. Im going to go pull the battery and try that. thanks
Posted By: mo12v
Date Posted: October 22, 2004 at 8:41 PM
Just searching.........Otherwise U may have to have Ford plug in to Computer
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MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: MN_Wild
Date Posted: October 22, 2004 at 8:51 PM
Tried locking the doors, quickly pulling the batteries on the remote and it still went wacko. I sure hope I dont have to go to ford. Really cant aford that but I guess at this point i may have no choice. UGH! Thanks again
Posted By: MN_Wild
Date Posted: October 24, 2004 at 5:40 PM
Heres what has seemed to fix it. In the trunk there is a sensor hooked to the key cylinder. I disconnected it and it seems to be fine now.Tome will tell if it is the long term fix that i needed. Thanks again for all the help.
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