Where are the door switches/relay located that control the alarm/lights when door is opened?
I have an intermittant problem with the alarm/horn/lights when the doors are locked. Sometimes when the car is locked either the interior lights will come on or the car alarm will sound or both will happen. If I leave it unlocked everything is normal. Local Ford dealer hasn't been any help.
The door ajar switches are mounted of the door latches inside the doors on most all newer fords That would be the best place to start with being that they do go bad from the door being shut banging them around. If the problem is still present check if someone has miss installed an aftermarket radio or remote start system.
Check the hood ajar switch first. It's located directly next to the windshield washer fluid refill cap. It costs about $20 on amazon and takes 5 minutes to replace. The door latches are about $175-200 and not easy to replace.
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