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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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want to bypass my faulty security alarm, light keeps blinking, already disabled the alarm. when I turn the key no dash lights come on

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want to bypass my faulty security alarm, light keeps blinking, already disabled the alarm. When I turn key no dash lights come on, Im sure alarm still has something to do with it. On my 99 Suburban

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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.

UPDATE 6/20/29

Use the trunk to first lock the driver door then unlock it.

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The shift from park to drive back to park worked!!!

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This diagnosis worked out for my 2002 expedition as well as my girls 2010 expedition also!! Hopefully some else can benefit from this information in the future, thanks!!!

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Do you start it while you shift at the same time or do you shift first and then started or do you started then shift so what is it what's the combo

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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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Mine does the same thing. I just hit the "unlock" button on my keychain remote and it starts right up.

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Turn your key on and let it on unhook your battery for 20 minutes then with the key still on hook your battery back up.should fix your anti theft light.

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How does the key unhook your battery ive always had to use a socket or wrench

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Try unhooking the positive battery cable with the switch on.Let unhooked for 15 minutes.Than hook cable back up with the key still on.than shut off and try to start.It worked on my f150.

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I use Ford fiesta but used different key to start after but couldn't start then we used the original key the red light comes on but the car doesn't start

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I have 2002 ford explorer how do I reset the anti thief on it ,please

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Unhook your positive cable with the key on for 30 minutes.then hook your cable back up with the key still on.that should take care of the light

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I have a 2005 ford explorer and the anti theft blinking have no crank no start what do I do

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2010 ford egde “anti theft falshing fast" door ajar light stays on. Check wires under e brake pedal. Left foot wore threw 7 wires cut em clean. Reconnected wires protected with a pc of carpet rolled around the bundle of wires after. Fixed my problems

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I have 2001 f150.I had the windshield resealed and then did a reset .I turn the key on and unhooked the positive battery cable for 30 minutes with the key still on I hooked the cable back up.took care of my anti-theft light.starts right up now.

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I have a 1999 Ford Explorer and the theft light is flashing rapidly and the car won't start ?

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Try turning your key on and unhooked the positive battery cable for 15 minutes and hook your positive battery cable back up with the key still on.

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First off the time that the battery is disconnected keeps getting shirter by 5 mins secondly its a pats security system issue just turn the key to the on position for about ten mins your problem should go away

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I had the same problem..I tried every one of these other methods with no luck. Took me a month to figure it out and luckily I could still start my vehicle and bypass using ignition key by touching something long and metal, e.g. A screwdriver, to these 2 bolts under the hood and start it that way but what a pain everytime I needed to start it.. I finally found this answer in an old forum somehwere and it worked!

Answer: Anti theft system had been activated, you need to push the 7/8 9/0 keypad buttons at the same time then enter the unlock code to disable the system. Sometimes this can also work by using the door key to first lock the drivers door then unlock it.

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Whats the unlock code

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I had an 01 expedition with anti-theft light blinking and took it to dealer to reset. I was told fuel pump was bad. Anti-theft shuts down the fuel pump so they're idiots. Transponder in on the ignition switch was not reading chip in key so I dug the chip out of the key and removed transponder from ignition and taped the chip to the transponder and stuck it up under the dash out of the way. No problem since.

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Turn your key on and unhook the positive cable,let unhook for 15-20 minutes, and hook back up with the key still on.should start up.

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Ì got a 2002 ford f150 theif light. Flashing no crank no start now when I push on the horn the cluster lights go out an the theif light like there is a short in there any one no

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Close the doors and lock them then take your key put it in the driver door now lock, lock, unlock. And your theft system should be reset and off now you can crank it up

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That will turn off the theft sensor Will it work for a 99 expedition

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Mine did this as well come to find out it was cuz the security chip in the key was damaged so the vehicle thought it was stolen when I tried to start it. Got a replacement key and my vehicle started right up.

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Ìn my case fuse #30 in the interior fuse box is antitheft and pcm fuse pull it for 20 seconds replace no light engine starts

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Use your key to lock and unlock your door locks from outside. Cycle them back and forth all the way. You cannot remove it.

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d0g has got ahold of key ot anew one what can ido

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