Question about 2003 Ford Ranger Regular Cab

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Truch wont start anti theft is on

Ford ranger 2002

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From my experience, the halo is what detects the rf signal from the head of the key. the halo (or transreiver ring) is located around the key cylinder. it could be malfunctioning. also, some keys have a capsule inside them that generates the signal. i have seen some keys where the capsule falls out. do you have another key and does it work. do you have a remote start system on your truck? hope this helps

Posted on Oct 22, 2008

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Your ignition switch(were you stick the key to start it) has probably worn down or maybe the key itself has worn down but either way with anti-theft if the key doesn't match the cylinder right then it thinks it's being stolen.

Posted on Sep 24, 2008

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Bought 02 ford ranger got home next morning won't start theft light flashing theft light. Read manual re programmed keys. Looks and un locked doors no start


You have two options , have it towed to the dealer or a moblie lock smith . Takes special tool's to see what is wrong .

Jan 26, 2017 | 2002 Ford Ranger

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2002 ford ranger won't start because anti theft


Unhook the battery for a couple of days and give the computer time to reset itself.

Oct 15, 2014 | 2002 Ford Ranger

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My 2003 ford rangers 4x4 4.0 anti theft system wont go off is there a reset button


A factory anti-theft system does not have a reset button.

Have you tried a different key?

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Turn ignition key and motor starts up, next day turn ignition key and motor just turns over and wont start. could it be anti theft problem its a 2002 f150 4 wheel drive with 4.6 liter


This could be caused by either a faulty Crank Shaft Position Sensor or the anti-theft system. Try put key in, turn to ON position for EXACTLY 10 minutes, As SOON as anti-theft light shuts off or stops flashing, then IMMEDIATELY start the engine.

Jan 13, 2010 | 2002 Ford F150 Regular Cab

2 Answers

How do you reset the anti theft system


Try disconnecting your battery cables then wait about 10 minutes. The computer should reset itself. Reconnect the wires to the battery. It is normal for the theft light to blink about every 5 seconds when the ignition key is out or in the off position. This means the system is armed and working properly. Hope this helps. God bless!

Aug 30, 2009 | 2000 Ford Ranger SuperCab

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