My Security Light Keeps Blinking On My 92 Buick Lasabre And It Wont Crank. Any Ideas As To Why?

There is a wiring harness block above the drivers left foot position which has a bolt in the middle of it where it connects through the firewall. unbolt and unplug it and on the bottom right of it there should be the two smallest wires out of all of them -they will lead back to the stearing collum and will both enter a single sheath going into the bottom of the collum. Stick a jumper wire from one wire to the other where the go into the back of the wiring harness block. plug the harness back together tighten the bolt and your car WILL START!!!!. You should should use a resister in the middle of the jumper wire with the same resistance as the chip in your ign. key but I just used a spare key I had and made a holder out of a clothespin to run the current through the chip in the key. Those two wires in the harness run up to thr ign. switch and to the two contacts for the key chip, They are either corroded or broken. GOOD LUCK!!!

My car did the same thing this morning. My mechanic told me to cut off the radio, ac and close the door. Cut the switch on like you are about to start it, leave it on for about 15 minutes until the security light stops blinking. When it stops blinking, turn the ignition switch off, take the keys out, and stick them back in and it should crank up. When I did this, it started right on up. This happened to me twice. The first time he brought his diagnosis machine and connected it to my car. The second time he told me those steps. He said this is resetting the security but it will only let you set the security a few times. Then I would have to get my ignition switch changed out. He said the diagnosis machine did not show there was anything wrong with the starter or the alternator.