The sensor typically uses a switch with a spring loaded plunger that is compressed when the door is closed and is released when the door is open.
Ford f150 door ajar sensor.
Fix door ajar light on ford first try lubricating the door ajar switch.
The 2009 ford f 150 has 2 problems reported for door ajar sensor faulty.
There is a tiny switch inside the door called the door ajar sensor remove the door panel and replace that switch it is attached to the door latch it just twists out and back in.
March 18 2018 a ford door ajar sensor lawsuit claims the sensors send false signals that the doors are open when they are in fact closed.
With power locks the door ajar warning switch activates the door ajar warning light when your door is open.
This action opens and closes an electrical circuit sending a signal to your vehicle s computer activating the door ajar warning light when the door is open.
Door open warning switch right.
It is simply a spring loaded plunger attached to a switch in the door that is compressed when the door is closed and extended when open.
If that doesn t work disconnect the electrical connector at the door latch and test for bcm power and ground.