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1998 mercury mountaineer anti theft system

Light on and car won't start. How do I reset this system?

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Reset when problem is corrected need to find out why system is activated --first check key and ignition cylinder for excessive wear or if chipped / battery key failure of key

Posted on Aug 10, 2017


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Posted on Jan 02, 2017

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SOURCE: 1994 cadillace anti theft system

I just had this same problem with a '96 . do you have a vats key in your '94? you need to bypass the VATS system. read some of the blogs on this site and it will tell you how to do it. I fixed mine with a $2 resistor from radio shack.

Posted on Oct 12, 2008

  • 1 Answer

SOURCE: 1997 ES 300 How to reset anti-theft system when car won't start

With the doors shut, insert the key into the drivers door lock. Lock and unlock the door 5 times. This should reset the system. If that doesn't work you should contact a qualified repair shop.

Posted on Mar 20, 2009

  • 232 Answers

SOURCE: anti theft dash light is blinking on my 1998 rodeo

I'm assuming its an original alarm or system that came from factory or dealer. When the light blinks is because the alarm is activated. Look underneath the radio the alarm brain might be there. There will be a label on it saying alarm or security system etc. Disconnect the harness to it and try operating your vehicle.

Posted on May 06, 2009

  • 175 Answers

SOURCE: anti theft device for 1997 ford expedition

try using a spare key first

Posted on Jun 02, 2009

  • 1 Answer

SOURCE: How to disable/reset anti theft system on a 98 Cavalier z24

how to get the anti-theif lightoff

Posted on Sep 25, 2010

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Jan 13, 2016 | 2005 Chevrolet Malibu Maxx

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I have a 2003 chevy malibu that won;t start. When you turn the key to on the Theft System light comes on steady ( no flashing). I t used o go into this mode periodically where the Theft System light...

I have had the same problem. This has happened to me three times in the past nine months or so. Per the owner's manual, you turn the key to the on position and wait about ten minutes. This resets the system and when the "Theft System" light goes out, it starts right up. I did this each time and it started right up.

Jan 02, 2013 | 2003 Chevrolet Malibu

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Replaced the fuel pump. the car starts, but won't stay running

The anti-theft system will keep the car from being driven, so I would start there. You may need to reset the anti-theft or check the ignition key for problems.

Jun 22, 2012 | 2001 Nissan Maxima

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I have a 2000 cavalier that I just bought used without a motor. Put a motor in it now it won't start and the anti theft light is on. I tried the GM reset proceedure but the theft light won't g

i had to change out my whole steering column there is a trick to make your car recongnize it...turn your key on but dont turn over leave on for up to ten min the theft light will go out when it does turn off car count to five then repeat this two more times. after the third time you turn off and count to five then turn the car on and turn over should start right up

Apr 12, 2012 | 1999 Chevrolet Cavalier

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The 'theft system' light does not turn off with the key in the run position on my 1999 chevy cavalier. car won't start, it won't even crank over. the battery and the starter are brand

try locking your car with the key and unlocking it with the key, leave it for 30 second or so between the locking and unlocking , the car thinks some one has tampered with it

Mar 18, 2012 | 1998 Chevrolet Cavalier

1 Answer

Anti theft light won't go out

There are 2 things to try:
1) Use your key to manually unlock the driver's side door - sometimes this alone is enough to reset your security system.
2) Put your key in the ignition and turn to ON position (do not try to start the car, just turn to ON)- after 30 seconds, attempt to start the car and see if the security light goes out.

Dec 08, 2011 | 2000 Mercury Sable

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1993 Buick Park Avenue we had a dead battery so we removed and charged it. Now the Car won't start and when I put key in the ignition the security light starts flashing

Any car with a Factory Anti-Theft System does this whenever battery power is lost. If your owners manual doesn't address this, you will have to contact a GM Dealer to get the system reset. Sorry!

Aug 25, 2011 | 1993 Buick Park Avenue

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2005 jeep grand Cherokee airbag light comes on after starting the car for no reason

More than likely one of your crash sensors has corrosion or has moisture intrusion. Have light reset at any good shop or the dealer - note if light comes back on then you'll need to have your system looked at.

Apr 01, 2011 | 2005 Jeep Grand Cherokee

2 Answers

99 chevy cavalier theft system light on steady, car wont crank.

My 2000 cavalier has done this for 6 months. You take your key out then open your door, wait ten minutes and the system resets itself and the car will start-annoying you bet!!!

Jul 20, 2009 | Chevrolet Monte Carlo Cars & Trucks

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