How do you disconnectt the anti theft on a Ford Contour?

Answer 1

Ford uses a transponder-type Passive Anti-Theft System (PATS) integrated into the car's computer. The computer uses an antenna coil around the ignition key cylinder to detect an electronic transponder chip (not a simple resistor) molded into the plastic head of the key. There is no way to disconnect it. It can be bypassed in any of several ways, ranging from crude to sophisticated.

Probably the simplest way to bypass the system is to remove the steering column shroud, remove the antenna coil from around the key cylinder, and affix a spare key to it in such a way that it will allow the car to be started with a non-transponder key. This rather crude technique has a number of drawbacks, not the least of which is, it is not always 100% successful.

Some companies that sell remote starter systems manufacture and sell electronic devices that will give a little more refinement to this method. They still use a spare key that has a transponder chip inside it, though: there is no way to avoid this.