Question about 1999 Cadillac DeVille

2 Answers

Car just shuts down

As i am driving, the theft mode light comes on and the car shuts down and won't start again. it has been towed 2x's and they can't find the problem. this is a cadillac dealer working on it.then it will start,get it home and there it sits because it won't start again.any solutions will help. thank you!
mickeydad4@hotmail.com

Posted by on

  • mickeydad4 Sep 29, 2008

    car was brought back to dealer with your response.he did not get a locksmith. he changed harness,couplings,ignition switch.brought car home, theft light came on again and car shut down. 3 days later it still won't start.what do you think? thank you! mickeydad4@hotmail.com

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Honestly if it's a VATS problem all you need to do is use a meter to test the resistance in the ignition key (on the shaft of the key there is a small black plastic square with a thin metal wedge) Put the volt meter on oms and place the leads on either side of this little wedge in the key, once you have this reading you will need to get a resistor(s) within +/- 10%. Under the dash find the main group of ignition wires, there will be one or 2 much thinner wires cased in a black or orange tube usually they are 2 white wires but unfortunately they can very...from this point it's kind of trial and error and you must be careful because of how thin the wires are. but cut one strip the ends put the resistor in-line if the car starts you made the right choice...sauder and tape, you will want to be gentle with the resistor because they can break pretty easily if you have a couple zip ties splint them around it.....OK if you decide to do this it is making the VATS system void...and if you don't want to try this yourself bring it to a car stereo shop where they install remote starts...they should know all about it!!!

Posted on Apr 19, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 62 Answers

If the theft light is comming on it will make it so it will not start i would take it to your local locksmith who has V.A.T.S. (vehicle anti theft system) equipment they can then read your key and make sure there is no problem if the key reads fine have them check at the bottom of the column they can hook up there machine and make sure it is reading the key to the bottom of the switch. Usually this is where the problem is there are only two small wire that go from the ignition cylinder to the harness below the column and after time they will break. Do this and it should resolve your problem. Thank You

Posted on Sep 10, 2008

  • Tim Carter
    Tim Carter Sep 30, 2008

    did he replace ignition cylinder and give you a new key?

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

How to reset computer on 2007 Chevrolet up-lander after battery change


I am going to take a wild guess and say that the security light was on steady before you decided to change the battery. I am also going to guess that it had been on for a while and you never looked into why it was on because the vehicle was starting an driving just fine.

What likely happened is there was a problem with the ant-theft system. The problem was likely minor and the system went into a limp mode of sorts allowing you to continue to drive and start the vehicle with no issues.

the problem with these limp modes is if the battery is disconnected the system shuts the vehicle down as no longer remembers that the previous problem happened when the vehicle was being operated normally. The system now thinks the vehicle is being stolen and is shutting down the vehicle.

You best bet is to tow it to a reputable shop that has experience with these systems to have the problem diagnosed, repaired and relearn the anti theft system.

Sep 20, 2014 | 2007 Chevrolet Uplander

1 Answer

Theft mode light


Has anyone changed the part of the ignition switch that reads the key value and sends it to the anti-theft module, it this part malfunctions it will lock you out, and you will be unable to start the car, they are a known fault for all GM lines with factory anti-theft systems, it is part of the ignition switch, but I believe that it alone can be replaced, call your local dealer and ask about the sensor for the VATS key in the ignition, they should know what the part is formally called.

Sep 29, 2008 | 1999 Cadillac DeVille

1 Answer

Why does my 2005 chevrolet classic theft system keep coming on and then the car won't start afterwards unless reset by turning the key to ACC for 10 minutes then the car starts?


If you have a spare set of keys try using the different key. The identity chip in your key may be shorting.

Otherwise the "Reader" in your ignition switch may be cutting out. This puts it into an activation loop.

Nov 08, 2012 | Cars & Trucks

1 Answer

I have a 2000 pontiac bonneville SLE that had a secondary anti theft system put in by original owner. When battery was low it would kick in and disable car to start. I had car towed to a place and...


1st of all Read Your owners Manual, Depending on the Radio you have in it will depend on the Alarm system . Also Completely Disconnecting the Battery Will Reset your Security System

May 09, 2017 | 2000 Pontiac Bonneville

1 Answer

I would like to know how to reset my anti theft on


The procedure for reprograming a key,
1 insert key and turn on but do not start, then turn off.
2 wait 15 minutes, turn key on, but do not start, then turn off
3 wait another 15 minutes and you should be able to start engine and drive away. You also have the option to have the car towed to the dealership and let them reset it with their scanner.

Jul 20, 2010 | 1996 Ford Taurus

1 Answer

I have a 1996 sable car starts theft light starts blinking then shut itself off


Take your chipped key in your driver side door lock. Turn in left and then right then left again. This should get it out of valet mode unless there is a button on the bottom of the dash. Your vehicle seems to be in valet mode which is why it is shutting down on you.

Sep 28, 2009 | 1996 Mercury Sable

2 Answers

Chevy cavalier z24 theft system light on


This is a easy fix. Lucky just follow the procedure and your car will start. This is a theft system shut down.
The procedure is. Disconnect battery for a minimum of 30 seconds. ( one post is OK. )
Reconnect battery and get in the car and start as usual 1 time only. When it starts and stops letthe key just return to run position as if it was running. Do not shut it off and if you do you must stert the procedure all over again. i usually put on the emergency brake before i start and that shuts of the driving lights etc.
Just leave the key in on running position and go have a coffee. it takes 15 to 20 minutes for the car to recycle the system. When you come back to the car the flashing theft light will either be off or solid.
Try to start again. If it doesn't go shut it off and turn back on and start as usual. It will start and run and stay running.
The reason you have this problem is something electronic was disconnected whe the battery was hooked up. always disconnect the battery before you touch anything electronic and you will not have this problem.

Apr 03, 2009 | 1999 Chevrolet Cavalier

Not finding what you are looking for?
1999 Cadillac DeVille Logo

217 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts

yadayada
yadayada

Level 3 Expert

71231 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22059 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7001 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...