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Where is the door ajar switch in 1997 Ford F-150?

The door ajar switch in a 1997 Ford F-150 isn't in one single location. Each door has its own switch. These switches are typically located within the door itself, in the door latch mechanism. You won't see them easily without removing the door panel.

To find them, you'd need to:

1. Remove the interior door panel: This involves unscrewing screws and carefully prying the panel away from the door. There are numerous online resources and videos showing how to do this for a 1997 F-150. (Search "1997 Ford F-150 door panel removal").

2. Locate the latch mechanism: Once the panel is off, you'll see the door latch mechanism. The switch is usually a small, plunger-type switch connected to the latch.

There may also be a switch in the tailgate, following the same principles.

Keep in mind that diagnosing a faulty "door ajar" light might require checking the wiring harness as well, as a broken wire could be the problem rather than the switch itself.