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Flashing red light on dash near windshield

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Old 09-25-2015, 10:41 AM
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Default Flashing red light on dash near windshield
Hi, I have a 2004 F150 XLT. When the truck is parked , engine off, there is flashing red light that flashes approx. every 5 seconds, located within few inches of windshield, inside. The manual doesn't address this and I can't see that I have an alarm of any sort on the truck.
What is this light for? Thanks>
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Old 09-25-2015, 10:48 AM
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Dummy alarm light, makes thieves think you have an alarm.
Last edited by Bruski; 09-25-2015 at 10:55 AM.
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Old 09-25-2015, 10:54 AM
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Theft deterrent.
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Old 09-25-2015, 10:55 AM
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BSM / VSM (body security module / vehicle security module), that's your alarm. Inside that housing is also your light sensor for your automatic headlights.
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Old 09-25-2015, 12:09 PM
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As others have indicated it is FoMoCo's immobilization system - Passive Anti-Theft System (PATS).
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