The anti theft system was activated on my 2006 Mercury Milan and I've tried following owners manual and many other suggestions that I read on line but still cannot deactivate it. Plz help, I just purchased this car for work and had it exactly two days and the system was activated and I have no idea why. When I bought the car the previous owner had installed a homemade toggle switch start or push button start wired straight to the starter.

The traction control light came in and everything went haywire and then shut the car off and it won't crank or do anything then after 3 to 5 days it would crank and after a hour or so the car would go haywire again and wouldn't crank so I pulled out the switch reprogrammed the key for the immobilezer and hot wired it and it was good for about 6 months and then it started again so put in a new switch but B4 that I started checking fuses and there was a whole block of fuses out don't know why but replaced the switch I'm not a mech but I don't know what's the problem is can anyone shoot a suggestion. Not many folks know a whole lot about any of this so anything could help