Repair guides and support for the Expedition, a full-size SUV based on Ford's F-150 pickup truck. Closely related to the Lincoln Navigator.

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Anti-theft light is blinking and won't start

Truck won't start when anti-theft light is blinking. How do I reset it?

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1, Try turning the key and moving the shift from park to drive and back. Then try starting it again!

2. Try your spare key in case the chip has failed in your primary key.

3. If you get it started, go to an Auto Zone and get a computer read out to see if it will tell you what the issue is.

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Some anti-theft lights blink by default ( a small red light near the dash, for example is there to warn off thieves ). If this is some other type of light then disconnect your battery (negative first then positive) for 30 minutes and reconnect in reverse order (positive then negative). This should reset the computer. You will loose presets in your radio.

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