Component Description

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Door Ajar Switch

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.

Interior Lamp

All of the interior demand lamps receive voltage from the demand lamp relay (integrated into the BCM) when the battery saver feature is not active. This is used by each interior lamp to power the demand LED within it.

All of the interior courtesy lamps receive voltage from the interior lighting output of the BCM. This is used by each interior lamp to power the courtesy LED within it.

For vehicles without an overhead console, the front interior lamp provides ground to the rear lamp to activate/deactivate the rear lamp.

For vehicles with an overhead console, the front interior lamp sends a message to the rear lamps to activate/deactivate them through a LIN circuit.