Question about 1994 Cadillac DeVille

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Anti theft system engaged car wont start up what can be done

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This is a very common problem on GM vehicles. Its very hard to figure out what "part" is causing the theft failure as there are so many parts involved. Here is a link that lists the symptoms of a securiy failure, explains why/what causes a failure, and offers some good DO IT YOURSELF ways to fix this forever. http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on May 25, 2011

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1994 pathfinder wont start, wont engage, wont turn over. think i activated the anti theft device


try disconnecting battery and when disconnected switch ignition on the reconnect with ignition on may reset system sounds like a cental lock problem try tailgate

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does it have a remote start in it some times they can cause problems or you need a new ing switch and if the anti theft light comes on and the car wont start but turns over put the key in the ing switch and leave in on pos for 15 to 20 min to reset anti theft system.

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My theft light is flashing but my 1997 expedition wont start.The vehicle turns over but just don't start.


ANTI-THEFT SYSTEM Passive anti-theft system
Your ignition key has a unique imbedded transponder which engages engine electronics and allows the vehicle to be started. Without the use of your special ignition key, the vehicle will not start.

During each vehicle start, the coded key is read by the anti-theft system. If the key’s ID code matches the code in the anti-theft system, the vehicle is enabled to start.

Anti-theft system
Briefly illuminates when the ignition is turned to the ON position to verify that the passive anti-theft system is operating properly.

Also, its possisble that tou have actovated the fuel pump switch.

CHeck it.

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1 Answer

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I have a service manual. I suppose you are talking about the anti-theft system. It says that if there is power going to the starter when you try and start that the anti-theft system is ok and that means that it is allow the car to start. If there is not power to the starter then your anti-theft system is stopping the car from starting for some reason.

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That one your going to have to goto the dealer for. I think the alarm you have is after market, so you will probably have to if them check it.

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