My 2004 Lincoln Towncar Signature suddenly developed this habit of setting off the alarm for no reason at all. No wind, no one touching it, etc. How can I bypass this alarm?

not that i have found. Ford has this habit of changing the bolt hole patterns every year on their parts

2002 lincoln town car signature ac relay Bing images

It may be up under the dash, above the pedals, and may be in a spring clip.
Good luck!

I currently have the same issue with mine. It usually starts after the car has been running a few minutes or if I accelerate quickly. A friend of mine suggested the motor mounts.

You only need spark plugs, and put antiseize on the threads so they can be removed years later.

what other year than a 1994 will fit on a 1994 lincoln towncar

open your hood locate the back of the light that you want to replace these are usually held in place by self locks turn the light counterclockwise until it unlocks pull it out of the opening be sure that you dont touch the tip of the new bulb with your finger or hand or youll blow it as soon as you turn it on (the oils in your skin) put the new one in and reverse the process to install.

Have you checked the fuse, and checked all connections?