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I would go after the door lock first. Older fords have a switch on the door lock that disables the alarm. They tend to break and fall though. I have replaced them with a momentary on/ff switch.But the alarm would go off when opening the door. On some older ones(85,87)(no keypad) I could disconnect the security module and it did just fine.
It sounds like the key sensor in the drivers door is malfunctioning, the drivers door is the only door that can enable/disable the alarm, if you try to unlock any of the others it will trigger the alarm.
Sometimes with my Kia I have to (without opening the door), cycle lock and unlock several times before the alarm is disarmed.
Have you tried this is succession, with all the doors locked:-
put the key in the drivers door, turn to lock and then to unlock, the alarm should disarm.
Also, if any of the door locks are jammed, the alarm will still activate when you try to unlock the drivers door.
If that fails and the alarm still activates, then it's a problem with the key sensor in the door.
REPLACE YOUR DRIVER SIDE DOOR LOCK MOTOR BEFORE YOU REPLACE IT DISCONECT IT FROM ELECTRICAL CONECTOR TRY LOCKING CAR IF IT WORKS THEN REPLACE THE LOCKING MOTOR LET ME KNOW MABY I CAN HELP IF YOU NEED ME TWO OK
obvious and thats because someone has damaged the lock ,go to dealer and order a new lock for that door with the chassis number and change the lock ,unless the back of the lock mechanism is damaged do the keys turn in the lock and nothing happens or wont they do into teh lock??
anit theft is activated. It should deactivate if you close all doors and hood and open with key or fob from outside of truck.
You must have opened a door by reaching inside and opening the door when it was locked. Once locked, it msut be unlocked with key or fob so the ouside lock sensor will tell the module it was unlocked porperly. Or, you have a bad door lock sensor switch.
You might just need to reset it. Roll the drivers window down and close all the doors. Lock all the doors with the key ) turn the key to lock twice, The electric locks should lock all the doors. wail a few minutes and unlock and open the trunk with the key. relock the truck or just close it. unlock the drivers door with the key, twice. all the doors should unlock, get in and start the car. Now this does'nt always work. If it does'nt we'll make the system think it's running. Close and lock all the doors. open the hood and disconnect the battery, one ccable will be fine. wait a few minutes. Reach in though the open window and turn the key all the way on. Don't open the doors, go around and connect the battery hard so it does'nt jump or skip. Reach thought the window and start the car/ once it's running. turn it off remove the key and unlock the door from the inside and open the door ( as if you were inside.) get in and start the car and everything should be back to normal.
You may want to check manual, or call dealer for disarm procedure, but some are disarmed by key in drivers door, (lock and/or unlock, some are passenger door) Try key in drivers door, turn left then right.