Question about 1999 Oldsmobile Alero

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Security light in 99 Oldsmobile Alero

I read in another post that you could advise how to bypass the security feature in the 99 Oldsmobile Alero and was wondering if you could tell me how it's done. My mom's Alero has issues with the security light flashing and then the car won't start. She waits the 10 minutes and then it may start or she may have to continue waiting 10 minutes again, and again. We would like to bypass the system but don't even see a fuse that we can pull. Please help!

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  • mstgrl2000 Sep 16, 2008

    Worked great and solved the problem! Thanks!!!

  • Anonymous Dec 16, 2008

    I have the same problem, and will try your solution...thanks for posting!

  • Anonymous Jan 12, 2009

    I have the same problem

  • Sphinxess Mar 10, 2009

    I have the same problem and I want to try the solution provided simply because I was quoted $350 to fix just the "part" or whatever was needed without installation. So my question is...What's the worst case scenario for cutting these wires? Say I cut them and they don't work, am I still looking at $350 to fix it or are we talking about having to replace other parts as well then?

  • Anonymous Mar 16, 2009

    i have the same problem on a 2003 alero. Can either bypass or get a new sensor for about 150 bucks

  • alero1999 Mar 16, 2009

    same problem with the 99 alero security light.

  • Anonymous Apr 26, 2009

    2002 alero

  • Anonymous Mar 14, 2014

    once battery is connected horn and side markers go off, i pulled the fuse for the horn but the lights still flash


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There isnt a fuse for the theft system. You need to take the coloum cover off. Should be 3 screws and you will see all the wires in there. The ones you need are three togather. White Black and Yellow. Get the car started and cut the yellow wire. The theft light will come on and stay on but will bypass the theft system. If it is a 2 wire system you will see two little metal strips on the upper side of the key. You have to use a ohm meter and measure the resistance of the strip in there. Its a resistor used to tell the theft computer the key is in there. Anyway find out what the resistance is and buy a resistor from radio shack and look under the steering wheel for the 2 very small guage wires in a yellow cover....NOTE not the air bag wires. Simply cut those wires ( the 2 white ones) and on the set going away from the steering wheel strip the wires and put the resistor one one wire and the other end of it to the other wire....That will disable that system. If its the 2 wire and you have issues getting it simply take the car to a car audio place that does remote starts and for a nominal fee they will do it for you. My records show that it has the 3 wire system.

Posted on Sep 16, 2008

  • Mrcoffee007 Feb 14, 2011

    I have a 1999 olds olera and I follow the instruction I found on a differt site. I have a in dash ignition , all I had to do was take the collar off from the dad where the speed-o is. 2 screws and pulled it out to show the ignition. Look on the left side and you will see the black , yellow and white wires. Not the ones on the back. They will be THIN wires. Start the car and cut the yellow. I let it run for a little bit and the turned it off and taped the longer wire and put ever thing back to gather. It was SOOOO easy. This rocks

  • mine2luv
    mine2luv May 11, 2012

    would it be possible at all for you to give more detail on how you fixed the security problem? i have a 99 olds light goes on.yes waiting exactly 10 min works but is not acceptable..miles dial turns to go slow,service engine and change oil light go on when ever...otherwise the car runs great with very good overdrive...i do need details on how to fix the security problem...thank you li


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I own a 1999 Alero and unfortunately, this happens to me. I read in another post that you should turn your key to ACC, wait for the security light to stop flashing or go out, then turn the ignition off, then back on again to restart.I tried this just a couple of minutes ago and low and behold, it worked! Still, it 's a pain in the wazoo!

Posted on Mar 30, 2009

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I cannot believe it! I did what they said on solution #3. Turned the key to ACC It took about 1 to 2 minutes before the security light stopped flashing. Turned the ignititon off and then it started back up on the first try. Excellent!

Posted on Mar 10, 2010

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Wiggle wires under driver side seat did this yesterday cause I got stranded worked great! hasn't flashed yet.

Posted on Mar 03, 2010

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So I have a 99 alero. Same problems as everyone else. So far i have replaced the BCM, replaced the ignition lock cylinder and passlock sensor, and have done the bypass. the car is still doing the same old thing. Cranks then cuts back off after a few seconds. With each replacement i did the 30 minute relearn process, yet the problems still exist. ANY OTHER SUGGESTIONS?

Posted on Oct 24, 2012

  • zackcchs
    zackcchs Oct 24, 2012

    So I have a 99 alero. Same problems as everyone else. So far i have replaced the BCM, replaced the ignition lock cylinder and passlock sensor, and have done the bypass. the car is still doing the same old thing. Cranks then cuts back off after a few seconds. With each replacement i did the 30 minute relearn process, yet the problems still exist. ANY OTHER SUGGESTIONS?


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2. The security light on the Dashboard will flash for exactly 10 minutes..
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Security Light

First, try checking the switch in the door because you could have a crossed wire. you will have to pull out the button and check the wires on all doors and trunk/boot. In the meantime, I will try to find an answer to your question.

Nov 06, 2008 | 1999 Oldsmobile Alero

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