Theft light flashing

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Jun 4, 2021 | 11:16 AM

#21

raysorenson

Senior Member

Joined: Jan 2021

Posts: 528

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Quote:

Originally Posted by blupupher

You are lucky to have the PATS broken with you being able to start the truck.
I still lean towards it being either bypassed with either a tune or a spare key in the column.

I suspect that PCM remanufacturers do stuff to make PCM installation easier for the end-user. To replace a PCM using IDS at the stealer, the PCM is 1)Updated to the latest calibration, 2) A "parameter reset" must be performed which is just the PCM and Cluster meeting each other, 3) Key erase and program. Turning off PATS in the PCM allows you to bypass all that and drive off.

Jun 4, 2021 | 09:58 PM

#22

blupupher

Looking for a Henway.

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Joined: May 2013

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From: Katy, Republic of Texas

Quote:

Originally Posted by ProjectSHO89

If it was a "spare key in the column", the light would act normally, as designed. I've done several of those "redneck PATS bypass" setups on some of my older Fords.

Scratch that as a possibility.

OK, was not sure if the light would flash if there were 2 chipped keys next to each other.
Kept meaning to go out to my truck with 2 keys to check.

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