2009 ford edge anti theft light flashing won't start

Disconnect the battery and clamp the two cables together for about 15mins to drain the memory off the computer then try again.

Your vehicle has two theft systems - content theft , if the door is opened without the key or keyless entry key fob the horn honks lights flash . PATS - passive anti-theft system ,this keeps the vehicle from starting if the computers don't see the right code from the transponder pellet in the head of the key .
You can turn off the content theft but not the PATS , when trying to start the vehicle does the theft light flash fast ? Red light on top of the dash .

Taking the vehicle to a qualified repair shop that has the diagnostic tool to read the DTC'S - diagnostic trouble code's . Then they can diagnose the problem . None of the thing's you tried will work , not for anti-theft systems , not suppose to. The computer isn't seeing the correct transponder code or the anti-theft module is the problem . Having the vehicle checked by a qualified service tech is the only way to resolve your problem .
Ford's PATs - Passive Anti-Theft System Information. Permalink
Many Ford trucks, vans and suvs use PATs (passive anti-theft) keys. These keys prevent someone from copying your key to a blank and using the blank. There is a small chip in the key which the vehicle must recognize before it will start.
PATS is Ford Motor Company's passive anti theft system. In 1996 it started showing up on select models of Ford and Lincoln Mercury vehicles. The keys for these vehicles have a tiny radio frequency transponder imbedded in the plastic Head.


When you attempt to start the vehicle, the onboard computer sends out a RF signal that is picked up by the transponder in the key. The transponder then returns a unique RF signal to the vehicle's computer, giving it the ok for the vehicle to start and continue to run. This all happens in less than a second, and is completely transparent to the vehicle operator. It is a very effective system that does its job without the vehicle owner having to think about it, or modify his / her usual routine.

What year and type of vehicle is it?

Hi Linda , your vehicle has a anti-theft system problem ! Jumping it is not going to help ! The anti-theft system stops the starter from working ! Do you headlamps shine bright ? Horns work normally ? If you look at that security light when trying to start the vehicle does it flash rapidly ? Your going to need to have taken to the dealer , there the only one's that have the diagnostic tools to find out what is wrong !

This is the anti-theft system working properly. The vehicle has lost communication with the key and it this causes it to go into theft mode. This can happen randomly, or if the battery in the vehicle was replaced. Unfortunately this means a trip to the dealership to have them reprogram a key.

try a diffrent key,your extra one.Could be the micro-chip inside is not comunication with anti-theft-.This happened to me.I used the spare set for a few days .then the other key started working again

the light blinks when the system is armed. Normal.

Your key has to be able to communicate with the receiver in the ignition area. Does your other key work ok?

Anti-Theft The passive anti-theft system (PATS) uses radio frequency identification technology to deter a driveaway theft. Passive means that it does not require any activity from the user.

• During each vehicle start sequence, the ignition key identification code is requested by the PATS module.
• If the key's ID code has been programmed into the system, the vehicle powertrain control module (PCM) (12A650) is allowed to operate; this allows the vehicle to start.
• If the key's ID code is not programmed into the PATS module, or if no encoded key is detected, then the vehicle PCM is disabled.

The PATS module, located under the driver side instrument panel, communicates the state of the security system to the PCM via the module communications network. The PCM, based on the communications from the PATS module, will determine if the vehicle's engine will be enabled to start. If the PCM prevents the vehicle from starting because of PATS, the PCM will store a DTC in memory.
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The anti-theft vehicle protection system utilizes the THEFT indicator, located in the instrument cluster (10849), when the ignition switch is turned to the RUN/START position. The indicator provides system prove out and operating status to the customer or technician.
Each PATS ignition key holds electronics that give each key a unique ID code.
The PATS will activate the indicator signal when the ignition switch is turned to the RUN/START position. The THEFT indicator will turn ON for two seconds, then turn OFF.
If the THEFT indicator flashes for one minute or more, this indicates that there was no key code received.
When the vehicle ignition switch is placed in either RUN or START, the PATS module requests the ignition key ID code. The PATS module requests the ignition key ID code by supplying power, ground, and the carrier signal to the transceiver to energize the ignition key. After the energize period, the key transmits its ID code to the transceiver module, which sends it to the PATS module.
The PATS module then compares the received KEY ID code to those stored in memory (16 maximum). If the ID matches, the PATS module sends an enable signal to the PCM over the module communication network.
The passive vehicle protection system utilizes the engine management capabilities of the PCM to enable or disable the vehicle engine. The module communication network is used to send and receive messages to and from the PCM.
Within one second after engine start, the PCM must receive an enable signal from the PATS module through the module communication network or the engine is disabled before the vehicle can be moved.
If the PATS module recognizes a stored ignition key code but there is a module communication network concern preventing the PCM from recognizing the start enable signal from the PATS module, the vehicle engine will be disabled. If this happens, the PATS module will flash the THEFT indicator for one minute, then flash diagnostic trouble code 16 ten times to indicate there is a problem with the module communication network circuits or the PCM is not responding properly.
The passive vehicle protection system will disable the vehicle from starting if there is a:

• Damaged encoded key.
• Unprogrammed key.
• Non-encoded key (key has no electronics).
• Wiring concern.
• Transceiver concern.
• Control module concern.
• Module communications network concern.
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Key Programming —Spare Key NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.
NOTE: Performing this procedure does not erase existing programmed keys.

1. Insert the programmed key in the ignition. Turn to RUN.

1. THEFT indicator proves out after two seconds.

1. Remove the programmed key.

1. Within 15 seconds, insert the new key in the ignition and turn to RUN.

1. THEFT indicator proves out after two seconds.

1. The extra key is now programmed.

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Key Programming —New Key (Without Diagnostic Tool) NOTE: Before starting this procedure, make sure the key(s) you want to program have the correct mechanical cut.

1. Insert the nonprogrammed key in the ignition and turn to RUN.

1. THEFT indicator flashes rapidly.

1. After 15 minutes of flashing, the THEFT indicator will stop flashing.

1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.

1. After 15 minutes of flashing, the THEFT indicator will stop flashing.

1. Within five minutes after the THEFT indicator has stopped flashing, turn the ignition key to OFF and back to RUN.

1. After 15 minutes of flashing, the THEFT indicator will stop flashing.

1. All originally programmed keys are now erased, and only the key in the ignition is programmed.

1. Additional keys may be programmed; refer to Key Programming—Spare Key .

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realay in fuse box

This means that your key is not being recogonized.Ethier the chip in the key is bad or the patts transciever at the lock cylinder. Do you have a spare key? If not you will have to get 2 new keyss cut and programmed.