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Home >> Lincoln >> 2018 >> MKZ Select, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1578 (Interior Lighting (Except Electric)) >> Description And Operation >> Interior Lighting - System Operation and Component Description >> Component Description >> Door Ajar Switch

Door Ajar Switch

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

The door ajar switches (ground switches) each receive a voltage signal from the BCM on independent circuits. When the door is closed, the door ajar switch is closed, routing the signal to ground. When the door is opened, the door ajar switch opens.

Ground is provided to the door ajar switches from the door modules.

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