Lincoln Repair Questions? Ask a Mechanic for Answers ASAP
Hello, Eddie here and I will do my best to help. Usually this problem is associated with sticking door latch switches, the microswitches are located in the door latch assembly, What I recommend doing first is this, spray some WD40 or PB plaster into each door latch as much as you can where the latch hit's the striker and holds the door closed, then open and close each door about 10 times after spraying penetrating oil all over the latch jaws. This will usually cure it, if that does not help, then the alarm triggers are stored in the Anti Theft module, You will need to have the vehicle scanned and see what triggers are stored and that tells you where the fault is, could be any one of the doors, or hood, or lift gate. But seeing what is triggering the alarm can usually pinpoint where the problem is. Let me know if you have any further questions. Here is the electrical schedmatic if you want to experiement with removing some fuses that shows you which fuses power up the security system however, I would not recommend pulling fuses to unpower the central security module, as that may cause issues with the headlamps, turn signals or horn working properly.
Let me know if you have any further questions. Thank you!