Question about Ford F-150

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New ignition cylinder

I changed the lock cylinder on my 2000 f150 and now the theft light is blinking and will not let the fuel pump come on. I bought the key and cylinder with the chip in it just like the old one.

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The new key needs to be programed into the vehicles computer for it to work properly.

Posted on May 11, 2009

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Posted on Jan 02, 2017

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02 olds alero no start system shut down


Where did you try to by-pass at , with the 2000 ohm resistor ? Is the SECURITY light lit on the instrument cluster ? Probably has another problem other then the key . The anti-theft system in your vehicle can not be by-passed by using a resistor .

The Passlock™ System is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. If starting is attempted without authorization from the Passlock™ System, the powertrain control module (PCM) will disable engine starting. Start disable may be in the form of fuel disable or starter disable, depending on engine application.

Your best bet , take it to a qualified repair shop . Before you render it unfixable . (cost to much )

Jan 26, 2017 | 2002 Oldsmobile Alero

1 Answer

2000 grand am security light comes on can i bypass that with remote start


Are you the one who bought the vehicle new ? Replaced ignition switch or the ignition lock cylinder ? No , sorry, but a remote start will not by pass anti-theft system .

The vehicle theft deterrent system is designed in order to prevent vehicle theft by disabling the fuel injectors unless the lock cylinder is correctly engaged by a mechanical key. The theft deterrent system uses the following 4 components for theft prevention:
• The lock cylinder
• The ignition switch
• The body control module (BCM)
• The powertrain control module (PCM)
When starting the engine, the PCM searches for a password from the BCM through the Class 2 serial data circuit. If the password is not recognized or not present, the PCM will disable the engine. Two modes of tamper detection are provided:
No password received
The engine will start and stall quickly. SECURITY telltale will flash on the instrument panel cluster (IPC) and then stay ON steady.
Incorrect or disable password received (More than 3 invalid passwords are received)
The engine is disabled for at least 10 minutes and the SECURITY telltale will illuminate solid on the IPC during the 10 minutes.
After the vehicle has passed theft detection, the PCM will continue normal operation.

Jan 09, 2017 | Cars & Trucks

1 Answer

Put new ignition switch in starts for two sec then dies anti theft light will sometimes blink like it should or it blink ten times then stays on the wider color for it is black white and like a tan


Ignition switch ? The key lock cylinder or the electrical part ? Did you change key ? Program key ? What make , model and year vehicle ? Wires for what ?

Dec 23, 2016 | Cars & Trucks

1 Answer

Theft light blinking, will turn over, but will not start. I can lock and unlock doors with the key fob. I only have one key. Any suggestions would be helpful


can you hear the fuel pump run when you turn the key to the run position(not start position)maybe nothing to do with theft light-cheers Denny

Oct 17, 2013 | 2001 Ford F150 Styleside SuperCrew

1 Answer

I have a f150 2000 v8 triton motor, i drove it the other day it started fine, than I went to start it again and it wouldnt start, than it started when i took to garage they said it was fuel pump and


If the anti-theft light is flashing, I would think it is a problem with the key or the anti-theft system. The system would kill the power to the fuel system.

Aug 29, 2012 | 2000 Ford F150 Flareside SuperCab

1 Answer

2003 f150 turns over but wont crank, also theft light blinking fast


Usually means the sensor in the lock cylinder is not reading the code in the key.
If the pass key system does not get the right signal from the key the truck will not start.
You might try taking the key off your ring - put it in the lock and turn the switch on - but don't crank it for at least a minute.
There are procedures to reset the anti-theft online - - if you do a search for resetting anti-theft F150 you can read them.

Jul 26, 2012 | Ford Cars & Trucks

1 Answer

Have a 2001 saturn sl that will not start in the late afternoon during the hottest part of the day. When I try the anti theft light blinks and the car will not start. Was able to override that for about...


you may have a failed ignition lock cylinder, the only for sure way to know is to take the car to a gm dealer and have them diag the car. (read the code) You can not bypass the theft system it controls fuel and ignition control module. If you have an independent repair shop with a scanner that can read a saturn control module it might be cheaper. The parts you will need tor replace isa lock cylinder new key and have the new lock cylinder coded

Aug 22, 2010 | 2001 Saturn SL

2 Answers

2002 Ford F150 anti theft engaged, light blinking but wont turn over


Try turning the key from off to run ( do not start ) and wait 5 seconds, to see if the theft light on the cluster goes out.
If it does, check the fuel pump relay and the fuse for the fuel pump, and the fuel inertia switch in the passenger side kick panel.
If the light does not go out, as Ren1221 posted, try another key. If you do not have another key, you will need to tow it to a dealer or repair shop that can perform the erase all keys, and program 2 new keys.

Jul 17, 2010 | 2002 Ford F150 Regular Cab

1 Answer

Anti theft lock


disconnect the battery for 3 mins

May 04, 2010 | 1999 Ford F150 Regular Cab

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