Chrylser anti-theft system disabling

New poster here with a post directed at anybody who owns an early 1990s decade chrysler with the anti-theft security system. The security system in these cars disables the fuel system once an alarm occurs and then the car can not be driven. Unlocking the door with the key should stop the alarm. The system works well until its broken and then the car simply will not run.

Unfortunatley, Chrysler has done a very poor job telling the public how to remedy the problem so it can be very frustrating dealing with this issue. However, Chrysler did do a good job of providing an over-ride for the anti-theft system. The driver's side door has a switch that is connected to the key-lock cylinder. this switch is the override for the anti-theft system computer. If the alarm is on and will not allow the car to operate, grounding the the hot wire going to this switch will turn off the alarm.

An easy way to ground the switch is to trace the switch wire back up to the first plug from the switch. The plug is about 18 inches from the switch. While the switch is still plugged in you need to short across the pins going to the switch. You can access them on the outside of the plug where the wires enter the pins. I used a small pair of needle nose pliars to touch the two pins at the same time.

Once the pins are shorted, the alram system will be disabled. You should now be able to start the car. Once the car is running, unplug the connector going into the alarm system module which is typically located behind the globe box. If you unplug the module while the car is running the alarm system will be permanently disabled. Unplugging the alarm system while the car is not running will only tell the cars computer that you are trying to steal the car.

The car has an onboard diagnostic test that troubleshoots the alarm system, however, it can be misleading and may not tell you the correct fault. Even if you do find out the true fault, you may not be able to correct it because Chrylser no longer makes or sells the anti-theft computer and trying to find a working one in a junk-yard is not easy. Therefore, I recommend trying this procedure and simply disable the system.

John