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What can you do if the anti-theft system is engaged on a 1994 Buick LeSabre and the car won't start?
The car uses keys ("Pass-Key II" is simply a GM VATS key)with a security chip. The chip is actually just a resistor with one of 15 possible values (the resistance determines GM's numerical value). If the lock in the steering column does not make proper contact with the chip, the wrong value is sent to the security module and the car will not start (Security light ON). There are two methods to prevent the car from operating: 1) there is a relay in the starter circuit controlled by the security module. 2) The security module sends an AC signal to the computer to enable the computer, no signal, no run. My simple fix was to locate the wires to the switch, two small wires in a plastic jacket, unlike any other wires exiting the steering column, and modify the circuit. Cut the cable and solder in a resistor of the same resistance as the chip in a key. Google found instructions on adding a remote start to vehicles with this system. The car then runs, but the extra security of the chip is lost, but on a car that is not 10+ years old??
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