I have had a security light come on and go away after a no crank. After 3 minutes, the Buick would start just fine. Recently, that stopped working and the no crank persisted. This time, however, the security light wouldn't stay on. I tried the 10 minute relearn process (three times) and it started once for me. Recently, the relearn process didn't hold up and now, the Buick won't start at all. There's no security light. Once the key is in the "on" position for 5 seconds, the security light goes off and it won't start. I get all cluster lights, windows work, everything works, but car just won't start. I thought I'd need to bypass the Passkey II system with a resistor bypass, but since there's no security light, I'm thinking it may be the starter relay. Can anyone help steer me in the right direction?
You've probably fixed it by this time, but I'll offer this: There's a microswitch in the ignition lock cylinder. When you insert the key, turn it & go past the run, to start position, the PassKey module wants to see the correct resistance from the pellet in your key. If it matches the pre-programmed value, it will complete the circuit of what is known as a "Wheatstone Bridge " in the module, and allow ignition, cranking & fuel systems to operate. If it doesn't see the correct value, it will shut down for like 5 minutes or something, then reset for the next try. The problem is, that after innumerable cyclings of the key, one of the the two wires will separate internally, disabling the system totally. The two wires exit the lower end of the steering column, & are a very shiny white, and orange in color. They terminate in a connector that can be disconnected. Do that. Then take a measurement between the two exposed wires in that little black pellet on your key, with an ohmmeter & obtain a resistor of the same value. Don't worry about the wattage value of the resistor....a 1/8 watt resistor will work just fine, as there is minimal current in the circuit. Insert the resistor into the two wires that go into the wiring harness (Not the two going up into the steering column). If the microswitch was at fault, your problem is now cured, although your PassKey system is now disabled. The upside is that you can now have spare keys made from the cheap blanks without the resistor in them. Good luck.
SOURCE: 1995 Buick LeSabre won't start when security light comes on.
When my 1994 LaSabre had a problem recognizing the chip in the key (due to the contacts in the lock not working), I managed to bypass the system by locating the two wires (clear tube with two smaller wires in it exiting the steerin column, unlike any other wiring), cutting the cable, and soldering a resistor across the two wires that go to the hidden module thet in turn controlls the starter and sends a signal to the engine computer. Use a resistor of the same resistamce value as in one of the keys for the car (measure resistors with a digital meter). There are a dozen or so values used. You loose the extra protection of the chip, but the fix is low cost.
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SOURCE: replaced ignition and steering wheel now car wont start -security light on
Hi......
On your Buick 94.
The problem is the ANTI THEFT SYSTEM..
If you have replaced the ignition switch.
If you are using a NEW KEY, the car won't start.
Because in the OLD KEY, is there a Resistence with a number of ohm's
The computer need the resistence to activate the the signals to operate the vehicle.
OK.. with the New Key and Old Key you can go to any Aloha Smith and they will remove the Chip from the Old Key to the New Key.
And the car must start and running.
But if you are using the Same Key that you have before the repair made.
I recomend to check the 2 Orange wires from the Ignition lock Cylinder to the steering column lower connectors.
Ok I hope this work for your problem.
Any moree info, I will glad to help you.
I'm a Mechanic and have all the repair information for all the cars.
Thank you for use fixya...
SOURCE: 1999 Buick Regal starting problems
Connect a volt meter to the neg. and pos. of the battery. Have an assistant start your car and watch to see how far the voltage drops. If it drops more than 2 volts, for example, hook up the meter, you should see 12 volts. By starting the car and it drops below 10 volts during start up, your starter is slowly going out. It taking more amperage to start it than normal.
SOURCE: 1999 Buick regal Security light on. Won't start.
I had the same problem with my 95 Lesabre. The owners manual says to take the key out, and wait 3 minutes(until the light goes off). It should fire right up.
SOURCE: 1997 cadillac concourde deville, car wont start
Try to reset the p.c. by unpluging the batt. for 10 min that should do the trick.
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