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Thief system

No start on a 1999 ford f150. cranks but thief light flash s an won't start? ?

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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.

Posted on Jul 12, 2013

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Posted on Jan 02, 2017

mcgyver468
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SOURCE: l.e.d reads starting dissabled do to thief system

THE KEY HAS A CHIP INSIDE IT TO PREVENT THEFT. IF THIS KEY HAS THE WRONG RESISTANCE VALUE THEN IT WILL NEVER START. IF THE KEY IS A DUPLICATE, THEN YOU MAY NEED TO GO TO THE DEALER WITH PROOF OF OWNERSHIP AND THEY WILL BE ABLE TO MAKE A NEW KEY. I COULD BYPASS THE MODULE BUT SOME SECRETS ARE ONLY FOR THE PROS. IT WOULD BE A BREACH OF SAFETY AND SECURITY TO INFORM YOU OF THE BYPASS SEQUENCE. I WOULD ASK MY CUSTOMER FOR PROOF OF OWNERSHIP BEFORE ATTEMPTING THIS PROCEDURE. SORRY, BUT I AM SURE THAT THIS ANSWER DOESN'T HELP MUCH. BEST OF LUCK TO YOU. THANK YOU FOR AN HONEST RATING AND FOR USING FIX-YA.

Posted on May 11, 2009

cansmo
  • 2431 Answers

SOURCE: anti-thief system cut off power to den gine an won't cut it back on

If you are dealing with the anti theft the anti theft will flash as you are trying to start the vehicle if this is the case then it is the anti theft if not then you are not dealing with a ant theft issue. You can do a 30 minute relearn procedure without a scan tool. here is how Turn ignition on without the engine reunning.attempt to start the vehicle then release the key to ON.(vehicle doest start) Observe the security light.afeter 10 minutes the security light will turn off.Turn off the ignition and wait 5 seconds.do this 3 times for 30 minutes. start the engine with the engine started the vehicle will learn the passlock key.

Posted on Feb 24, 2012

skychief2001
  • 21873 Answers

SOURCE: 1999 ford escort zx2 cranks but won't start

As with any no-start issue, you will need to figure out if you have a problem with fuel pressure to the injectors, or spark to the plugs.
I would also check the computer for trouble codes.
Let me know what you find out.

Posted on Jul 31, 2012

redds55
  • 2620 Answers

SOURCE: 1999 ford windstar start & dies start & dies, thief light is not flashing or on

Take the mass air flow sensor off and clean the small wires inside of it using a non-chlronated brake cleaner then let it dry for 10-15 minutes and re-install.If the problem still exists would check the throttle position sensor.

Posted on Nov 01, 2012

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When I'm driving my 2002 Ford Taurus will sometimes hesitate, the thief light on the dash will flash and if my cruise control is on it will go off; what is causing this problem?


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1999 ford windstar start & dies start & dies, thief light is not flashing or on


Take the mass air flow sensor off and clean the small wires inside of it using a non-chlronated brake cleaner then let it dry for 10-15 minutes and re-install.If the problem still exists would check the throttle position sensor.

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Have you tried resetting the alarm system?

There should be a reset button under the dash board: turn the key in the ignition all the way forward just before cranking and hold the reset button until the light changes solid.

You can also disconnect battery for 2 minutes and/or repeat the above procedure.

Jun 03, 2012 | 2004 Ford F150

1 Answer

I just replaced battery and alternator on my 1999 ford f150, still wont turn over, need advise


I'm assuming you mean it won't crank.I believe Fords still have an external stater relay,try shorting acroos the two large terminals with a screwdriver.If it cranks by doing this,verify you get 12 volts on the smaller wire when you turn the key to the start position.If you do,then its the relay.

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I changed the starter on my1997 cavalier but it won't start, how do i turn of antitheft system?


The system is not really made to be turned off. If you could, so could a car thief. Read this link. Tells you how to bypass the system. You can do this yourself. http://vatspasslockpasskeysecurityhelp.yolasite.com/

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