Question about 1996 Cadillac DeVille

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Everytime I go to turn my car on. it say security

I have a 1996 Cadillac Deville. It has a manufacture alarm everytime I go to turn my car on it say security system disabled wait 3 minutes it counts down and after the three minutes it starts its doing it everyday now. How do I disconnect a manufacture alarm oris their any other soulution.

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There is a detailed write-up here: . The guy is great, this was the only way I was able to save my Park Avenue. I see it applies to your model too.

Posted on Apr 25, 2010


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My 1999 deville alarm goes off everytime i open a door . dont have remote . which fuse can i take out ? not label'd

if you have a key try to lock then unlock door before you get in this tells computer you have key and might work the remote turns it on and off maybe try a shop that installs remote starts ask for a universial remote or google 99 deville fuse diagram hope this helps good luck

Jun 11, 2014 | 1999 Cadillac DeVille

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Installed new battery on 98 deville and the horn stays on when battery is connected

It thinks it was stolen , security. Hook the battery up and then turn the car on. This should stop the horn and reset the security.

Aug 14, 2011 | 1997 Cadillac DeVille

1 Answer

How do I disable, remove completely the factor security alarm? I have a 1998 Cadillac Deville. I just want to how to completely remove it because it is locking me out constantly. My husband put in a new...

The only way to remove a factory security system is to remove the entire car and buy another one. The security system is an integral part of the engine management system. If you disable it, you will not be able to start your engine.

Feb 22, 2011 | 1998 Cadillac DeVille

5 Answers

My security light is on and flashing, wont let me start the car and keep it running, how do i turn the security system off or reset it

leave the key in the ignition, turned to 'run' (just before the crank position) and leave it there for about 15 minutes-the security light will then stop flashing-do NOT turn it off, turn it to crank and start the car. You have a security module that is not seeing the same resistance in the ignition switch as it expects, meaning you will have to either replace the ignition switch (expensive) or bypass the module (easy and inexpensive)-I have done lots of these, requires about 15 cents worth of parts and can be done in 1/2 hour.

Jan 24, 2011 | 2002 Pontiac Grand Prix

1 Answer

My 98 deville says theft system problem car may not restart and i have checked the ground. i also have put an after market stereo and alarm in could this cause it? what is my problem

I would suspect the problem is with the aftermarket alarm. I would consult the manufacturer of the alarm and see if there are any problems with compatibility with the OEM alarm.

Oct 19, 2010 | 1998 Cadillac DeVille

1 Answer

Power, but can not start

Try to quickly engage and disengage the starter motor by rotating the key all the way forward and back to ignition on only, and back again several times a second until the starter motor engages.

Sounds like the starter motor solenoid is sticking, maybe.

This happens on my 1997 Cadillac Deville sometimes on hot summer days or even in the winter.

I thought it was the security system, at first, but it is more likely a starter motor going bad.

Apr 13, 2010 | 1996 Cadillac DeVille

1 Answer

Keyless remote wont work and everytime a door is opened alarm sounds for 30 secs can it be reprogrammed to work?

try replacing the battery in the remote and then have the alarm program re flashed if the new battery in the remote doesn't fix the problem.Unfortunately I believe this has to be done at the caddy dealer.good luck

Jan 02, 2010 | 1998 Cadillac DeVille

1 Answer

1996 cadillac DeVille. How to install Turn Signal Switch

You have to pull the air bags, and steering wheel, and disassemble the anti theft plate in the column. This task may be better left to a shop, it is fairly difficult if you know what you are doing, and nearly impossible without the requried pullers....

Sep 21, 2009 | 1996 Cadillac DeVille

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