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Lurch, Ford Cert.
Category: Ford
Satisfied Customers: 20443
Experience:  Ford Cert., Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
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1999 Ford Mustang: bypass..module..anti-theft system..the car to crank

Resolved Question:

Can I bypass the anti-theft module on my 1999 Ford Mustang. When I put in the key, the anti-theft system doesn't allow the car to crank. Its the original key that came with the car.
Submitted: 8 years ago.
Category: Ford
Expert:  Lurch replied 8 years ago.

No the PATS system cannot be eliminated


If the Theft Light is flashing when you try to start the car, then the PATS device is not recognizing the Key. If you only have one Key, then you will need to have Ford or Locksmith connect Scan Tool & Reprogram the Key to a "Master Key".
If you have 2 or more Keys, try one of them first.

You can try this also:


Disconnect the Negative Battery cable for apprx. 5 minutes.
Reconnect the Battery
Lock and ulock the door with the remote or key.
Turn Ignition Switch to the run position just before Start (crank)
If the Theft Light stops flashing then start the vehicle.
If it still flashes then leave the key on for at least 10 minutes.
Then try to start.
If it fails to start then both key/s will have to be reprogrammed.
Be sure to have the Key/s programmed to "Master Key"

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