Question about 1998 Ford Mustang

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Theft light blinks rapidly and car wont start

I have 3 keys none work last time it took 2 hours of trying them for it to start ran good for 2 weeks now has same problem

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  • nick420 Apr 13, 2009

    98 mustang ..theft light blinks same with check engine.. car will crank but not start

  • Anonymous Apr 16, 2009

    wont start and keeps blinming theft

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1 Answer

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  • Ford Master
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You may have a problem with the key sensor in the ignition lock cylinder, if it goes bad the system can't id your key code and it locks you out.

Posted on Dec 04, 2008

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start with fully charging your battery.

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1998 mustang the anti theft lite is blinking car wont fire it turns over


might wana have that theft turned off i had mine turned off on my 99 due to too manny problems i was like wtf so i had it turned off so now u dont need a key with a (chip) if u turn it off saves alot of time! down the road its stupid

Mar 01, 2013 | 1998 Ford Mustang

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2000 ford expedition wont start,security light in dash keeps flashing when trying to start,speedometer and gauges move when trying to start,,,fuel pump was replaced last year,,please help.thanks.


Your vehicle is equipped with a passive theft deterrent system that utilizes a "pill" embedded in your key along with a receiver contained in the steering column. If the system doesn't recognize your key, the vehicle will crank but not start and the theft light will flash rapidly. If you have another key, try it. Otherwise, you're in for a trip to the dealer where they can either reset the system or troubleshoot it further.

Good luck.

Apr 01, 2011 | 2000 Ford Expedition

1 Answer

Starter ok no blown fuse. all lights working but it wont start. anti theft light blinking fast os soon as you turn it to on. what is the problem.


it is the microchip on your key.. you have to reset the key by sticking it into your ignition and turn it to the run position for 5 mins. at this time the light should stop blinking then turn your key to the off position for 1 sec. repeat six times then your last attempt the car would start guarantee.... notice: as you turn the key to run position the light would blink rapidly for 5mins.. right when it stops turn to the off position for 1 sec.. remember six times..

Feb 01, 2011 | 2004 Ford Explorer

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The car wont start, the brake pedal is locked like the anti-theft is active, the anti theft light is flashing when the keys are in the ignition. when i try to turn it on it doesnt turn over, just makes...


TRY REPROGRAM KEY .PUT KEY IN IGNITION SWITCH TURN IGNITION SWITCH ON POSITION 20 SECONDS DONT START ENGINE WAIT 20 SECONDS TURN OFF SWITCH THEN TURN SWITCH BACK ON 20 SECONDS WATCH THE THEFT SECURITY LIGHT BLINKING.WHEN THEFT STOP BLINKING VECHICLE WILL CRANK.IF LIGHT STILL BLINKING.TRY FEW MORE TIMES KEY IN SWITCH ON POSITION FOR 20 SECONDS.MAKE SURE YOU HAVE THE CORRECT CAR KEYS IN SWITCH IF NOT WRONG SET OF CAR KEYS WILL SET OFF THEFT SECURITY SYSTEM.IF KEY RESETTING TRICK DONT WORK.CHECK BATTERY POWER MAKE SURE YOUR BATTERY HAS 12.5 VOLTS AND CHECK SECURITY THEFT FUSE.IF ALL LOOKS GOOD YOUR SECURITY HAS TO BE CHECKED OUT AT THE DEALERSHIP.

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1999 Sunfire 2.2L wont start


Try starting it with the shifter in neutral. You might have a bad
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May 14, 2010 | 1999 Pontiac Sunfire

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Dont know how to reset or bypass gm theft system car is not starting .It tries and quits.


this is one way to reset it :
first make sure the battery is fully charged , then do the following:
key in the ignition but do not crank the motor, just leave it at the
ignition mode for ten minutes ,then turn it off POSITION for 5 seconds then REPEAT again 2 more times. at the 3 rd time youre gonna notice the ANTI THEFT light on dash to blink. when doing the last step , remove key , inserted again and turn on motor , good luck , AJ

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Lost my instrutions and alarm speaker not installed. can,t start


put key in driver side door lock and unlock it should turn off the alarm and you should be able to start it, it will do this anytime the power is distrupted or if you unlock the jeep from any door other than the driver real pain....

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1995 Chrysler Concorde


the alarm is activating when he locks it and for some reason the key or fob isnt deactivating it..check the disarm switches in the door

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No start / start/ anti theft light?


MAY BE YOU HAVE A DEFECTIVE KEY, CHECK IF THE KEY HAS A PELLET IN IT, IF SO THE KEY IS BAD AND YOUR DEALER CAN REPLACE IT.
THE PELLET IS A RESISTOR FOR THE ANTITHEFT.

May 28, 2008 | 2003 Chevrolet Malibu

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