security anti-theft system

what is your question,this car has the anti-theft system.

Sorry, My 1993 Mercury Grand Marquis sometimes fails to start (like dead, but lights work) jumper cables do not help. By the time wrecker gets to me, car starts, no problem. Is this an Anti-theft problem? If so, can it be fixed? It is just random and no one has been able to find cause.

My 1996 Mercury Grand Marquis sometimes fails to start (like dead, but lights work) jumper cables do not help. By the time wrecker gets to me, car starts, no problem. Is this an Anti-theft problem? If so, can it be fixed? It is just random and no one has been able to find cause.

yes that is the problem that I am having

My anti-theft light is not blinking at all. My car won’t start/crank. I’ve replaced the PCM had it programmed with two keys cut to match my original key. I’ve replaced the battery, the alternator, the starter, even the battery terminals and still no crank no start. The lights work just find the windows work but the power lock for the door don’t work. I’ve tried to relearn the keys still nothing happened. Can someone please tell me what I can do to get my 2006 Mercury Grand Marquis ls to crank

Same problem took it to ford needs a engine wiring harness which is like finding a needle in a haystack

When I stick the key in the ignition.. an turn it I hear I buzzing noise coming from the back at the top of the engine. Only thing I haven’t tried is the ignition switch. But why is my anti theft light not blinking at all not even once. With or without the key still no red light

Did you ever get this issue fixed? I'm having the same problem and have the noise under the hood.